API request fails with "wrong_credentials" …why? Naomi June 08, 2018 10:51 Updated Follow The end-user has entered one or some of their credentials incorrectly. Still having problems… The end-user can try again. Too many times will block the account resulting in a account_temporarily_locked error. Have a look at our comprehensive list of the authentication error descriptions in our API documentation. Related articles Authentication fails with "invalid_grant_type" …why? API request fails with "validation_error" …why? Comments 0 comments Please sign in to leave a comment.