diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index a4be24e..80cd260 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -59,7 +59,6 @@
             android:enabled="true"
             android:exported="false" />
 
-        <activity android:name=".activity.SelectServerActivity"></activity>
+        <activity android:name=".activity.SelectServerActivity"/>
     </application>
-
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/net/schueller/peertube/activity/LoginActivity.java b/app/src/main/java/net/schueller/peertube/activity/LoginActivity.java
index 9a2fe32..5118071 100644
--- a/app/src/main/java/net/schueller/peertube/activity/LoginActivity.java
+++ b/app/src/main/java/net/schueller/peertube/activity/LoginActivity.java
@@ -1,57 +1,43 @@
 package net.schueller.peertube.activity;
 
-import android.animation.Animator;
-import android.animation.AnimatorListenerAdapter;
-import android.annotation.TargetApi;
-import android.content.pm.PackageManager;
+import android.os.StrictMode;
 import android.support.annotation.NonNull;
-import android.support.design.widget.Snackbar;
 import android.support.v7.app.AppCompatActivity;
-import android.app.LoaderManager.LoaderCallbacks;
-
-import android.content.CursorLoader;
-import android.content.Loader;
-import android.database.Cursor;
-import android.net.Uri;
-import android.os.AsyncTask;
-
-import android.os.Build;
 import android.os.Bundle;
-import android.provider.ContactsContract;
-import android.text.TextUtils;
-import android.view.KeyEvent;
+import android.util.Log;
 import android.view.View;
-import android.view.View.OnClickListener;
-import android.view.inputmethod.EditorInfo;
-import android.widget.ArrayAdapter;
 import android.widget.AutoCompleteTextView;
 import android.widget.Button;
 import android.widget.EditText;
-import android.widget.TextView;
-
-import java.util.ArrayList;
-import java.util.List;
+import android.widget.Toast;
 
 import net.schueller.peertube.R;
+import net.schueller.peertube.helper.APIUrlHelper;
+import net.schueller.peertube.model.OauthClient;
+import net.schueller.peertube.model.Token;
+import net.schueller.peertube.model.VideoList;
+import net.schueller.peertube.network.AuthenticationService;
+import net.schueller.peertube.network.GetVideoDataService;
+import net.schueller.peertube.network.RetrofitInstance;
 
-import static android.Manifest.permission.READ_CONTACTS;
+import java.io.IOException;
 
-/**
- * A login screen that offers login via email/password.
- */
-public class LoginActivity extends AppCompatActivity implements LoaderCallbacks<Cursor> {
+import okhttp3.FormBody;
+import okhttp3.MediaType;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.RequestBody;
+import okhttp3.Response;
+import retrofit2.Call;
+import retrofit2.Callback;
+
+public class LoginActivity extends AppCompatActivity {
+
+    OkHttpClient client = new OkHttpClient();
+    public static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");
+
+    private String TAG = "LoginActivity";
 
-    /**
-     * A dummy authentication store containing known user names and passwords.
-     * TODO: remove after connecting to a real authentication system.
-     */
-    private static final String[] DUMMY_CREDENTIALS = new String[]{
-            "foo@example.com:hello", "bar@example.com:world"
-    };
-    /**
-     * Keep track of the login task to ensure we can cancel it if requested.
-     */
-    private UserLoginTask mAuthTask = null;
 
     // UI references.
     private AutoCompleteTextView mEmailView;
@@ -63,43 +49,25 @@ public class LoginActivity extends AppCompatActivity implements LoaderCallbacks<
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_login);
-        // Set up the login form.
-        mEmailView = (AutoCompleteTextView) findViewById(R.id.email);
 
-        mPasswordView = (EditText) findViewById(R.id.password);
-        mPasswordView.setOnEditorActionListener(new TextView.OnEditorActionListener() {
-            @Override
-            public boolean onEditorAction(TextView textView, int id, KeyEvent keyEvent) {
-                if (id == EditorInfo.IME_ACTION_DONE || id == EditorInfo.IME_NULL) {
-                    attemptLogin();
-                    return true;
-                }
-                return false;
-            }
-        });
+        // bind button click
+        Button mEmailSignInButton = findViewById(R.id.email_sign_in_button);
+        mEmailSignInButton.setOnClickListener(view -> attemptLogin());
 
-        Button mEmailSignInButton = (Button) findViewById(R.id.email_sign_in_button);
-        mEmailSignInButton.setOnClickListener(new OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                attemptLogin();
-            }
-        });
+        mEmailView = findViewById(R.id.email);
+        mPasswordView = findViewById(R.id.password);
+
+//        if (android.os.Build.VERSION.SDK_INT > 9) {
+//            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
+//            StrictMode.setThreadPolicy(policy);
+//        }
 
-        mLoginFormView = findViewById(R.id.login_form);
-        mProgressView = findViewById(R.id.login_progress);
     }
 
 
-    /**
-     * Attempts to sign in or register the account specified by the login form.
-     * If there are form errors (invalid email, missing fields, etc.), the
-     * errors are presented and no actual login attempt is made.
-     */
+
     private void attemptLogin() {
-        if (mAuthTask != null) {
-            return;
-        }
+
 
         // Reset errors.
         mEmailView.setError(null);
@@ -109,195 +77,60 @@ public class LoginActivity extends AppCompatActivity implements LoaderCallbacks<
         String email = mEmailView.getText().toString();
         String password = mPasswordView.getText().toString();
 
-        boolean cancel = false;
-        View focusView = null;
+        // make http call to login and save access tokens
 
-        // Check for a valid password, if the user entered one.
-        if (!TextUtils.isEmpty(password) && !isPasswordValid(password)) {
-            mPasswordView.setError(getString(R.string.error_invalid_password));
-            focusView = mPasswordView;
-            cancel = true;
-        }
+        String apiBaseURL = APIUrlHelper.getUrlWithVersion(this);
 
-        // Check for a valid email address.
-        if (TextUtils.isEmpty(email)) {
-            mEmailView.setError(getString(R.string.error_field_required));
-            focusView = mEmailView;
-            cancel = true;
-        } else if (!isEmailValid(email)) {
-            mEmailView.setError(getString(R.string.error_invalid_email));
-            focusView = mEmailView;
-            cancel = true;
-        }
+        AuthenticationService service = RetrofitInstance.getRetrofitInstance(apiBaseURL).create(AuthenticationService.class);
 
-        if (cancel) {
-            // There was an error; don't attempt login and focus the first
-            // form field with an error.
-            focusView.requestFocus();
-        } else {
-            // Show a progress spinner, and kick off a background task to
-            // perform the user login attempt.
-            showProgress(true);
-            mAuthTask = new UserLoginTask(email, password);
-            mAuthTask.execute((Void) null);
-        }
-    }
+        Call<OauthClient> call = service.getOauthClientLocal();
+        call.enqueue(new Callback<OauthClient>() {
+            @Override
+            public void onResponse(@NonNull Call<OauthClient> call, @NonNull retrofit2.Response<OauthClient> response) {
 
-    private boolean isEmailValid(String email) {
-        //TODO: Replace this with your own logic
-        return email.contains("@");
-    }
+                if (response.body() != null) {
 
-    private boolean isPasswordValid(String password) {
-        //TODO: Replace this with your own logic
-        return password.length() > 4;
-    }
+                    Call<Token> call2 = service.getAuthenticationToken(
+                        response.body().getClientId(),
+                        response.body().getClientSecret(),
+                            "code",
+                            "password",
+                            "upload",
+                            email,
+                            password
+                    );
+                    call2.enqueue(new Callback<Token>() {
+                        @Override
+                        public void onResponse(@NonNull Call<Token> call2, @NonNull retrofit2.Response<Token> response2) {
 
-    /**
-     * Shows the progress UI and hides the login form.
-     */
-    @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
-    private void showProgress(final boolean show) {
-        // On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow
-        // for very easy animations. If available, use these APIs to fade-in
-        // the progress spinner.
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
-            int shortAnimTime = getResources().getInteger(android.R.integer.config_shortAnimTime);
+                            if (response2.body() != null) {
+                                Log.wtf(TAG, response2.body().getAccessToken());
+                                Log.wtf(TAG, response2.body().getExpiresIn());
+                                Log.wtf(TAG, response2.body().getRefreshToken());
+                                Log.wtf(TAG, response2.body().getTokenType());
+                            } else {
+                                Log.wtf(TAG, response2.toString());
+                            }
+                        }
 
-            mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
-            mLoginFormView.animate().setDuration(shortAnimTime).alpha(
-                    show ? 0 : 1).setListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(Animator animation) {
-                    mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
-                }
-            });
+                        @Override
+                        public void onFailure(@NonNull Call<Token> call2, @NonNull Throwable t2) {
+                            Log.wtf("err", t2.fillInStackTrace());
+                        }
+                    });
 
-            mProgressView.setVisibility(show ? View.VISIBLE : View.GONE);
-            mProgressView.animate().setDuration(shortAnimTime).alpha(
-                    show ? 1 : 0).setListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(Animator animation) {
-                    mProgressView.setVisibility(show ? View.VISIBLE : View.GONE);
-                }
-            });
-        } else {
-            // The ViewPropertyAnimator APIs are not available, so simply show
-            // and hide the relevant UI components.
-            mProgressView.setVisibility(show ? View.VISIBLE : View.GONE);
-            mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
-        }
-    }
-
-    @Override
-    public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
-        return new CursorLoader(this,
-                // Retrieve data rows for the device user's 'profile' contact.
-                Uri.withAppendedPath(ContactsContract.Profile.CONTENT_URI,
-                        ContactsContract.Contacts.Data.CONTENT_DIRECTORY), ProfileQuery.PROJECTION,
-
-                // Select only email addresses.
-                ContactsContract.Contacts.Data.MIMETYPE +
-                        " = ?", new String[]{ContactsContract.CommonDataKinds.Email
-                .CONTENT_ITEM_TYPE},
-
-                // Show primary email addresses first. Note that there won't be
-                // a primary email address if the user hasn't specified one.
-                ContactsContract.Contacts.Data.IS_PRIMARY + " DESC");
-    }
-
-    @Override
-    public void onLoadFinished(Loader<Cursor> cursorLoader, Cursor cursor) {
-        List<String> emails = new ArrayList<>();
-        cursor.moveToFirst();
-        while (!cursor.isAfterLast()) {
-            emails.add(cursor.getString(ProfileQuery.ADDRESS));
-            cursor.moveToNext();
-        }
-
-        addEmailsToAutoComplete(emails);
-    }
-
-    @Override
-    public void onLoaderReset(Loader<Cursor> cursorLoader) {
-
-    }
-
-    private void addEmailsToAutoComplete(List<String> emailAddressCollection) {
-        //Create adapter to tell the AutoCompleteTextView what to show in its dropdown list.
-        ArrayAdapter<String> adapter =
-                new ArrayAdapter<>(LoginActivity.this,
-                        android.R.layout.simple_dropdown_item_1line, emailAddressCollection);
-
-        mEmailView.setAdapter(adapter);
-    }
-
-
-    private interface ProfileQuery {
-        String[] PROJECTION = {
-                ContactsContract.CommonDataKinds.Email.ADDRESS,
-                ContactsContract.CommonDataKinds.Email.IS_PRIMARY,
-        };
-
-        int ADDRESS = 0;
-        int IS_PRIMARY = 1;
-    }
-
-    /**
-     * Represents an asynchronous login/registration task used to authenticate
-     * the user.
-     */
-    public class UserLoginTask extends AsyncTask<Void, Void, Boolean> {
-
-        private final String mEmail;
-        private final String mPassword;
-
-        UserLoginTask(String email, String password) {
-            mEmail = email;
-            mPassword = password;
-        }
-
-        @Override
-        protected Boolean doInBackground(Void... params) {
-            // TODO: attempt authentication against a network service.
-
-            try {
-                // Simulate network access.
-                Thread.sleep(2000);
-            } catch (InterruptedException e) {
-                return false;
-            }
-
-            for (String credential : DUMMY_CREDENTIALS) {
-                String[] pieces = credential.split(":");
-                if (pieces[0].equals(mEmail)) {
-                    // Account exists, return true if the password matches.
-                    return pieces[1].equals(mPassword);
+                } else {
+                    Log.wtf(TAG, response.toString());
                 }
             }
 
-            // TODO: register the new account here.
-            return true;
-        }
-
-        @Override
-        protected void onPostExecute(final Boolean success) {
-            mAuthTask = null;
-            showProgress(false);
-
-            if (success) {
-                finish();
-            } else {
-                mPasswordView.setError(getString(R.string.error_incorrect_password));
-                mPasswordView.requestFocus();
+            @Override
+            public void onFailure(@NonNull Call<OauthClient> call, @NonNull Throwable t) {
+                Log.wtf("err", t.fillInStackTrace());
             }
-        }
-
-        @Override
-        protected void onCancelled() {
-            mAuthTask = null;
-            showProgress(false);
-        }
+        });
     }
+
+
 }
 
diff --git a/app/src/main/java/net/schueller/peertube/activity/SearchActivity.java b/app/src/main/java/net/schueller/peertube/activity/SearchActivity.java
index 55876b6..976d00f 100644
--- a/app/src/main/java/net/schueller/peertube/activity/SearchActivity.java
+++ b/app/src/main/java/net/schueller/peertube/activity/SearchActivity.java
@@ -117,9 +117,9 @@ public class SearchActivity extends AppCompatActivity {
         SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
         String nsfw = sharedPref.getBoolean("pref_show_nsfw", false) ? "both" : "false";
 
-        String apiBaseURL = APIUrlHelper.getUrl(this);
+        String apiBaseURL = APIUrlHelper.getUrlWithVersion(this);
 
-        GetVideoDataService service = RetrofitInstance.getRetrofitInstance(apiBaseURL + "/api/v1/").create(GetVideoDataService.class);
+        GetVideoDataService service = RetrofitInstance.getRetrofitInstance(apiBaseURL).create(GetVideoDataService.class);
 
         Call<VideoList> call = service.searchVideosData(start, count, sort, nsfw, search);
 
diff --git a/app/src/main/java/net/schueller/peertube/activity/VideoListActivity.java b/app/src/main/java/net/schueller/peertube/activity/VideoListActivity.java
index 939ae1a..31a09c1 100644
--- a/app/src/main/java/net/schueller/peertube/activity/VideoListActivity.java
+++ b/app/src/main/java/net/schueller/peertube/activity/VideoListActivity.java
@@ -242,9 +242,9 @@ public class VideoListActivity extends AppCompatActivity {
         SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
         String nsfw = sharedPref.getBoolean("pref_show_nsfw", false) ? "both" : "false";
 
-        String apiBaseURL = APIUrlHelper.getUrl(this);
+        String apiBaseURL = APIUrlHelper.getUrlWithVersion(this);
 
-        GetVideoDataService service = RetrofitInstance.getRetrofitInstance(apiBaseURL + "/api/v1/").create(GetVideoDataService.class);
+        GetVideoDataService service = RetrofitInstance.getRetrofitInstance(apiBaseURL).create(GetVideoDataService.class);
 
         Call<VideoList> call = service.getVideosData(start, count, sort, nsfw);
 
diff --git a/app/src/main/java/net/schueller/peertube/activity/VideoPlayActivity.java b/app/src/main/java/net/schueller/peertube/activity/VideoPlayActivity.java
index 6c4adff..5d8f94e 100644
--- a/app/src/main/java/net/schueller/peertube/activity/VideoPlayActivity.java
+++ b/app/src/main/java/net/schueller/peertube/activity/VideoPlayActivity.java
@@ -92,8 +92,8 @@ public class VideoPlayActivity extends AppCompatActivity implements VideoRendere
         simpleExoPlayerView.setPlayer(player);
 
         // get video details from api
-        String apiBaseURL = APIUrlHelper.getUrl(this);
-        GetVideoDataService service = RetrofitInstance.getRetrofitInstance(apiBaseURL + "/api/v1/").create(GetVideoDataService.class);
+        String apiBaseURL = APIUrlHelper.getUrlWithVersion(this);
+        GetVideoDataService service = RetrofitInstance.getRetrofitInstance(apiBaseURL).create(GetVideoDataService.class);
 
         Call<Video> call = service.getVideoData(videoID);
 
diff --git a/app/src/main/java/net/schueller/peertube/helper/APIUrlHelper.java b/app/src/main/java/net/schueller/peertube/helper/APIUrlHelper.java
index 91b5199..6e60f4f 100644
--- a/app/src/main/java/net/schueller/peertube/helper/APIUrlHelper.java
+++ b/app/src/main/java/net/schueller/peertube/helper/APIUrlHelper.java
@@ -12,4 +12,8 @@ public class APIUrlHelper{
         SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(context);
         return sharedPref.getString("pref_api_base", context.getResources().getString(R.string.pref_default_api_base_url));
     }
+
+    public static String getUrlWithVersion(Context context) {
+        return APIUrlHelper.getUrl(context) + "/api/v1/";
+    }
 }
diff --git a/app/src/main/java/net/schueller/peertube/model/OauthClient.java b/app/src/main/java/net/schueller/peertube/model/OauthClient.java
new file mode 100644
index 0000000..35221bc
--- /dev/null
+++ b/app/src/main/java/net/schueller/peertube/model/OauthClient.java
@@ -0,0 +1,23 @@
+package net.schueller.peertube.model;
+
+public class OauthClient {
+
+    private String clientId;
+    private String clientSecret;
+
+    public String getClientId() {
+        return clientId;
+    }
+
+    public void setClientId(String clientId) {
+        this.clientId = clientId;
+    }
+
+    public String getClientSecret() {
+        return clientSecret;
+    }
+
+    public void setClientSecret(String clientSecret) {
+        this.clientSecret = clientSecret;
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/net/schueller/peertube/model/Token.java b/app/src/main/java/net/schueller/peertube/model/Token.java
new file mode 100644
index 0000000..4a703ea
--- /dev/null
+++ b/app/src/main/java/net/schueller/peertube/model/Token.java
@@ -0,0 +1,41 @@
+package net.schueller.peertube.model;
+
+public class Token {
+
+    private String accessToken;
+    private String expiresIn;
+    private String refreshToken;
+    private String tokenType;
+
+    public String getAccessToken() {
+        return accessToken;
+    }
+
+    public void setAccessToken(String accessToken) {
+        this.accessToken = accessToken;
+    }
+
+    public String getExpiresIn() {
+        return expiresIn;
+    }
+
+    public void setExpiresIn(String expiresIn) {
+        this.expiresIn = expiresIn;
+    }
+
+    public String getRefreshToken() {
+        return refreshToken;
+    }
+
+    public void setRefreshToken(String refreshToken) {
+        this.refreshToken = refreshToken;
+    }
+
+    public String getTokenType() {
+        return tokenType;
+    }
+
+    public void setTokenType(String tokenType) {
+        this.tokenType = tokenType;
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/net/schueller/peertube/network/AuthenticationService.java b/app/src/main/java/net/schueller/peertube/network/AuthenticationService.java
new file mode 100644
index 0000000..ce55b96
--- /dev/null
+++ b/app/src/main/java/net/schueller/peertube/network/AuthenticationService.java
@@ -0,0 +1,28 @@
+package net.schueller.peertube.network;
+
+import net.schueller.peertube.model.OauthClient;
+import net.schueller.peertube.model.Token;
+
+import retrofit2.Call;
+import retrofit2.http.Field;
+import retrofit2.http.FormUrlEncoded;
+import retrofit2.http.GET;
+import retrofit2.http.POST;
+
+public interface AuthenticationService {
+    @GET("oauth-clients/local")
+    Call<OauthClient> getOauthClientLocal();
+
+    @FormUrlEncoded
+    @POST("users/token")
+    Call<Token> getAuthenticationToken(
+        @Field("client_id") String clientId,
+        @Field("client_secret") String clientSecret,
+        @Field("response_type") String responseType,
+        @Field("grant_type") String grantType,
+        @Field("scope") String scope,
+        @Field("username") String username,
+        @Field("password") String password
+    );
+
+}
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_login.xml b/app/src/main/res/layout/activity_login.xml
index d64c6c2..1c90889 100644
--- a/app/src/main/res/layout/activity_login.xml
+++ b/app/src/main/res/layout/activity_login.xml
@@ -30,21 +30,6 @@
             android:layout_height="wrap_content"
             android:orientation="vertical">
 
-            <android.support.design.widget.TextInputLayout
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content">
-
-                <AutoCompleteTextView
-                    android:id="@+id/server"
-                    android:layout_width="match_parent"
-                    android:layout_height="wrap_content"
-                    android:hint="@string/prompt_server"
-                    android:inputType="textUri"
-                    android:maxLines="1"
-                    android:singleLine="true" />
-
-            </android.support.design.widget.TextInputLayout>
-
             <android.support.design.widget.TextInputLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content">
@@ -86,7 +71,6 @@
                 android:layout_marginTop="16dp"
                 android:text="@string/action_sign_in"
                 android:textStyle="bold" />
-
         </LinearLayout>
     </ScrollView>
 </LinearLayout>