fix incorrect login notification

[asanchezyali]

Update login notifications

• Issue: resolves Incorrect notification when logging in with a user that does not exist #60
• Target: Fix login notifications with messages that make more sense to the user.

Observations

1. The switch-case structure for error codes was changed by object literal.

const mapAuthCodeToMessage: { [key: string]: string } = {
  "auth/wrong-password": "Password provided is not correct",
  "auth/invalid-password": "Password provided is not correct",
  "auth/invalid-email": "Email provided is invalid",
  "auth/invalid-display-name": "Display name provided is invalid",
  "auth/invalid-phone-number": "Phone number provided is invalid",
  "auth/invalid-photo-url": "Photo URL provided is invalid",
  "auth/invalid-uid": "UID provided is invalid",
  "auth/invalid-provider-id": "Provider ID provided is invalid",
  "auth/email-already-in-use": "Email provided is already in use",
  "auth/user-not-found": "User not found",
};

3. The errors were propagated to the parent functions by reject. This looks like this for most cases:

   reject(new Error(mapAuthCodeToMessage[error.code] || "Something went wrong with your sign up process"));