# \[Solved\] Sign Up Check Mail **URL:** \ **Category:** Questions about Thunkable X\ **Tags:** solved\ **Created:** [July 26, 2022, 1:51pm UTC](https://community.thunkable.com/t/solved-sign-up-check-mail/1976531 "2022-07-26T13:51:28Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![yigitishesabigng](https://avatars.discourse-cdn.com/v4/letter/y/c0e974/32.png) [@yigitishesabigng](https://community.thunkable.com/u/yigitishesabigng)\ **Post date:** [July 26, 2022, 1:51pm UTC](https://community.thunkable.com/t/solved-sign-up-check-mail/1976531/1 "2022-07-26T13:51:28Z")
If the mail added to the database is the mail registered to the database, how can I give a warning when the button is pressed? ---
**Author:** ![zander](https://avatars.discourse-cdn.com/v4/letter/z/ecb155/32.png) [@zander](https://community.thunkable.com/u/zander)\ **Post date:** [July 26, 2022, 4:35pm UTC](https://community.thunkable.com/t/solved-sign-up-check-mail/1976531/2 "2022-07-26T16:35:19Z")
What kind of warning are you looking for? Can you provide more information please? ---
**Author:** ![manyone](https://avatars.discourse-cdn.com/v4/letter/m/ee59a6/32.png) [@manyone](https://community.thunkable.com/u/manyone)\ **Post date:** [July 26, 2022, 11:07pm UTC](https://community.thunkable.com/t/solved-sign-up-check-mail/1976531/3 "2022-07-26T23:07:43Z")
how about an alert block? ---
**Author:** ![yigitishesabigng](https://avatars.discourse-cdn.com/v4/letter/y/c0e974/32.png) [@yigitishesabigng](https://community.thunkable.com/u/yigitishesabigng)\ **Post date:** [July 27, 2022, 11:51am UTC](https://community.thunkable.com/t/solved-sign-up-check-mail/1976531/4 "2022-07-27T11:51:02Z")
The warning I’m looking for is “this email address is already registered, please enter a different email address or login with your registered email address” if the registered email address is entered while the user is registering. I want to issue a warning, warning is easy but I couldn’t figure out how to create that condition block. @zander @manyone ---
**Author:** ![zander](https://avatars.discourse-cdn.com/v4/letter/z/ecb155/32.png) [@zander](https://community.thunkable.com/u/zander)\ **Post date:** [July 27, 2022, 11:56am UTC](https://community.thunkable.com/t/solved-sign-up-check-mail/1976531/5 "2022-07-27T11:56:31Z")
Firebase does all of the heavy lifting for you. Here is the condition you need to check: If error: if error = ‘Firebase: The email address is already in use by another account. (auth/email-already-in-use).’ do alert. ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/0/1/01ce667c240759b7335010a51055a82206918274.png) ---
**Author:** ![yigitishesabigng](https://avatars.discourse-cdn.com/v4/letter/y/c0e974/32.png) [@yigitishesabigng](https://community.thunkable.com/u/yigitishesabigng)\ **Post date:** [July 27, 2022, 2:00pm UTC](https://community.thunkable.com/t/solved-sign-up-check-mail/1976531/6 "2022-07-27T14:00:14Z")
Thanks for your help, I want to ask one more thing. There is at least one number requirement in the password, how can I get the error “You must use at least one number in the password” when it is not entered? I didn’t put the condition, I think it’s automatic on firebase. ---
**Author:** ![zander](https://avatars.discourse-cdn.com/v4/letter/z/ecb155/32.png) [@zander](https://community.thunkable.com/u/zander)\ **Post date:** [July 27, 2022, 2:48pm UTC](https://community.thunkable.com/t/solved-sign-up-check-mail/1976531/7 "2022-07-27T14:48:36Z")
So firebase doesn’t require a number however you could do something like this to check to see if the password input text contains a number. If it doesn’t you can set an alert and say “must contain a number” ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/e/9/e9519897bd8dae6064e8ddab8431f3e5c8936eab.png) ---
**Author:** ![zander](https://avatars.discourse-cdn.com/v4/letter/z/ecb155/32.png) [@zander](https://community.thunkable.com/u/zander)\ **Post date:** [July 27, 2022, 3:00pm UTC](https://community.thunkable.com/t/solved-sign-up-check-mail/1976531/8 "2022-07-27T15:00:44Z")
Here is a more or less complete example. You just need to add your firebase API key. In this example I check to ensure that the password contains a number. You could repeat the same process to check to see if there is a special character or if it’s a certain length. Let me know if you need more help 🙂 Edit: I created a more concrete example: [Project Link](https://x.thunkable.com/projects/62e1506ef20a000226edb2be/ebe3fb37-ac37-4290-bf7b-3023e0a974d4/designer) ---
**Author:** ![yigitishesabigng](https://avatars.discourse-cdn.com/v4/letter/y/c0e974/32.png) [@yigitishesabigng](https://community.thunkable.com/u/yigitishesabigng)\ **Post date:** [July 28, 2022, 8:47am UTC](https://community.thunkable.com/t/solved-sign-up-check-mail/1976531/9 "2022-07-28T08:47:44Z")
Thanks for your efforts and interest. ---
**Author:** ![system](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/0/f/0f59f292712368bce16ff80133ae10de8a6f27e8.png) [@system](https://community.thunkable.com/u/system)\ **Post date:** [October 26, 2022, 8:47am UTC](https://community.thunkable.com/t/solved-sign-up-check-mail/1976531/10 "2022-10-26T08:47:58Z")
This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.