code: @NotNull
      @ObjectiveCName("signUpCommandWithName:WithSex:withAvatar:")
      public Command<AuthState> signUp(String name, Sex sex, String avatarPath) {
          return modules.getAuthModule().signUp(name, ApiSex.UNKNOWN, avatarPath);
      }
docs: Perform signup
  
  @param name       Name of User
  @param sex        user sex
  @param avatarPath File descriptor of avatar (may be null if not set)
  @return Comand for execution