TS2571 error: The object is of an unknown type

Auth-service.ts In the sign-in and sign-up methods, I am attempting to store authenticated user data. However, I encountered an error indicating that the object is of an unknown type.

signUp(email:any, password:any){
   return this._http.post<AuthResponse>('https://identitytoolkit.googleapis.com/v1/accounts:signUp?key='+ config.API_KEY, {
      email: email,
      password: password,
      returnSecureToken: true
    }).pipe(
      catchError(err =>{
        return err;
      }),tap(res => {
        this.authenticatedUser(res.email, res.localId, res.idToken , +res.expiresIn) 
      })
    )
  }

  signIn(email:any, password:any){
    return this._http.post<AuthResponse>('https://identitytoolkit.googleapis.com/v1/accounts:signInWithPassword?key='+ config.API_KEY, {
      email: email,
      password: password,
      returnSecureToken: true
    }).pipe(
      catchError(err =>{
        return err;
      }),tap(res =>{
        this.authenticatedUser(res.email, res.localId, res.idToken , +res.expiresIn)
                               ~~~        ~~~          ~~~            ~~~(object is type of unknown)
      })
    )
  }

AuthResponse-interface I have created an interface for response type in which I define the properties for using Firebase API.

export interface AuthResponse {
    idToken: string,
    email: string,
    refreshToken: string,
    expiresIn: string,
    localId: string,
    registered? : string
}

Answer №1

You appear to have omitted specifying the type of the parameter in the tap operator.

signIn(email:any, password:any){
  return this._http.post<AuthResponse>('https://identitytoolkit.googleapis.com/v1/accounts:signInWithPassword?key='+ config.API_KEY, {
    email: email,
    password: password,
    returnSecureToken: true
  }).pipe(
    catchError(err =>{
      return err;
    }),
    tap((res: AuthResponse) => {       // <-- define type here
      this.authenticatedUser(res.email, res.localId, res.idToken , +res.expiresIn)
    })
  );
}

Alternatively, you could opt for using bracket notation over dot notation.

signIn(email:any, password:any){
  return this._http.post<AuthResponse>('https://identitytoolkit.googleapis.com/v1/accounts:signInWithPassword?key='+ config.API_KEY, {
    email: email,
    password: password,
    returnSecureToken: true
  }).pipe(
    catchError(err =>{
      return err;
    }),
    tap((res: any) => {       
      this.authenticatedUser(res['email'], res['localId'], res['idToken'], +res['expiresIn'])
    })
  );
}

However, considering that you have already specified the type, it is advisable to use it instead of any.

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