I have a API class that gets data from an API and needs to return two pieces of information. I used the following function to get the data, which gets the Json and puts the data into a helper class and returns that class:

 async  register(name: string, username: string, email: string, password: string) : Promise<AuthResponse>  {
  
  const authResponse = new AuthResponse(); 

  const body = {
    'name': name,
    'username': username,
    'email': email,
    'password':  password
    };

    this.log.info('calling REST API at:' + this.API_URL);
    this.log.info('with a requestBody:' + body);
    
    axios.post(this.API_URL + '/', body)
      .then(response => {
        this.log.info(response.data);
        this.log.info(response.status);
        this.log.info(response.headers);

        authResponse.tokin =  response.data.token;
        authResponse.role = response.data.role;
   
      })
      .catch(error => {
        this.log.error("Error sending data: ", error);
        
      });

     
      return authResponse;     
           
  }

I call that function here:

authService.login(email, password )
      .then((result : AuthResponse) => {
        
      // Set our context state
      setAuthState({
        token: result.token,
        authenticated: true,
      });

      //set role in state
      setRole(result.role);

      // Set our HTTP Headers
      axios.defaults.headers.common['Authorization'] = `Bearer ${result.token}`;

      // Write the JWT to our secure storage
      await SecureStore.setItemAsync(TOKEN_KEY, result.token);

      return result;


      });  //then

I get the following error:

Argument of type '(result: AuthResponse) => AuthResponse' is not assignable to parameter of type '(value: void) => AuthResponse | PromiseLike<AuthResponse>'.
  Types of parameters 'result' and 'value' are incompatible.
    Type 'void' is not assignable to type 'AuthResponse'.ts(2345)

a working program.