Error Messages relating to User profile creation/updation etc.

There should be **clear distinct error message** for all the following cases (exact text may be discussed):

1. While sign-up:
A) Email Address already registered with an existing account
B) Password is weak (doesn't match the required scheme)
C) Required fields were not provided

2. Password Reset
A) Provided email address is not yet registered with any existing account (User has not signed up yet)

3. While logging-in
A) Email Address not yet registered
B) Email Address & Password mismatch

** All of the above-mentioned errors would be 4XX status code in the API response. For 5XX response, the frontend should show "Internal Error, please write a mail to DDCode Admin", and for such error, we should be able to check logs and identify what the error was and reply to the user as to how to fix it.

assigned to @raghosh

changed the description

mentioned in issue #51 (closed)

mentioned in issue #20 (closed)

mentioned in commit fc5be01d

Completed.

closed