HTTP Status Code 400 Error Codes (error property):

MissingPropertyValue - Missing property value(s).

PasswordTooShort - The new password does not meet the minimum length requirement.

PasswordAlreadyUsed - The new password has already been used.

PasswordLacksComplexity - The new password does not meet complexity requirements.

InvalidPassword - The password could not be changed. Please ensure you are using the correct old password.

PasswordIsEmail - The new password cannot be the email address.

HTTP Status Code 401 Error Codes (error property):

Unauthorized - An Authorization token was not provided and is required.

AccessTokenInvalid - The access token is expired or invalid.