You need to give us the text of the query you are trying to use (replace your API key with something linke API_KEY).

@monicakirabo said:
My API key
Hey,
I recently got an API key, but it gives me an 401 error whenever I try to use it.
Please help me to resolve this.
Thank you.

And if possible, also provide the full text of the error.
We have several 401 errors.

Code    HTTP    Message
3       401     Authentication failed: You do not have permissions to access the service.
7       401     Invalid API key: You must be granted a valid key.
10      401     Suspended API key: Access to your account has been suspended, contact TMDb.
14      401     Authentication failed.
16      401     Device denied.
17      401     Session denied.
30      401     Invalid username and/or password: You did not provide a valid login.
31      401     Account disabled: Your account is no longer active. Contact TMDb if this is an error.
32      401     Email not verified: Your email address has not been verified.
33      401     Invalid request token: The request token is either expired or invalid.
34      401     The resource you requested could not be found.
35      401     Invalid token.
36      401     This token hasn't been granted write permission by the user.
38      401     You don't have permission to edit this resource.
39      401     This resource is private.

30 401 Invalid username and/or password: You did not provide a valid login.
31 401 Account disabled: Your account is no longer active. Contact TMDb if this is an error.

after signup when i try to login i got these two errors in two different situations
if i register with ras and password ras then i got the error number 31
and if i register with some random username and password i got the error

now let me know what's the right way and best solution to use validate login api
Please thanks

@rashidmahar73 said:

30 401 Invalid username and/or password: You did not provide a valid login.
31 401 Account disabled: Your account is no longer active. Contact TMDb if this is an error.

after signup when i try to login i got these two errors in two different situations
if i register with ras and password ras then i got the error number 31
and if i register with some random username and password i got the error

I didn't understand. Where are you trying to Login?
Can you link to the page?
Or else the API Request you are using?

now let me know what's the right way and best solution to use validate login api
Please thanks

Perhaps reading the Docs instructions will help.
https://developer.themoviedb.org/docs/getting-started

Api request I am using.

Thanks for the reply.