title: Retrofit 404 not found web api
body: <p>I have a web api and an application. So I want to a Register app but I have a problem. I use the azure.
  There is my registerapi (interface)</p>
  
  <pre><code>@FormUrlEncoded
  @POST("/application/json")
  public void insertUser(
          @Field("Username") String Username,
          @Field("Password") String Password,
          @Field("Email") String Email,
          Callback&lt;Response&gt; callback);
  </code></pre>
  
  <p>and my mainactivty.java page</p>
  
  <pre><code>public class MainActivity extends AppCompatActivity {
  
  private EditText editTextUsername;
  private EditText editTextPassword;
  private EditText editTextEmail;
  private Button buttonRegister;
  final public static String ROOT_URL = "http://bsapmusic.azurewebsites.net/api/music/register";
  
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      editTextUsername = (EditText) findViewById(R.id.etusername);
      editTextPassword = (EditText) findViewById(R.id.etpassword);
      editTextEmail = (EditText) findViewById(R.id.etmail);
      buttonRegister = (Button) findViewById(R.id.btnkayit);
      buttonRegister.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View view) {
              insertUser();
          }
      });
  }
  private void insertUser()
  {
      RestAdapter adapter =new RestAdapter.Builder().setEndpoint(ROOT_URL).build();
      RegisterAPI api = adapter.create(RegisterAPI.class);
      api.insertUser(
              editTextUsername.getText().toString(),
              editTextPassword.getText().toString(),
              editTextEmail.getText().toString(),
              new Callback&lt;Response&gt;() {
                  @Override
                  public void success(Response result, Response response) {
                      BufferedReader reader = null;
                      String output = "";
                      try{
                          reader=new BufferedReader(new InputStreamReader(result.getBody().in()));
                          output=reader.readLine();
                      }
                      catch (IOException e){
                          e.printStackTrace();
                      }
                      Toast.makeText(MainActivity.this,output,Toast.LENGTH_LONG).show();
                  }
  
                  @Override
                  public void failure(RetrofitError error) {
                      Toast.makeText(MainActivity.this, error.toString(),Toast.LENGTH_LONG).show();
                  }
              });
  };
  </code></pre>
  
  <p>and I get retrofit 404 not found.</p>