Introduce ALREADY_APPLIED error code for duplicate partner access code usage #415
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Issue link / number:
#387
What changes did you make?
This commit introduces a new error code, ALREADY_APPLIED (along with the related test cases). This error will be returned when the access code has already been applied to the account.
Also handled the case when the access code is already used by another user. In this scenario, an ALREADY_IN_USE error will be returned.
Why did you make the changes?
To provide a more accurate error message for users who attempt to apply a partner access code that has already been used with their account or another user's account.