Fix: Ensure proper authentication when password is set against an user

[pankajjs]

• Closes AUTH not respecting password #1411

Description
This PR sets password against an user when password is set with --password flag while starting the server with
go run main.go --password pass command.

Working Proof

• Starting the server with password flag

• Connecting cli and executing command without auth

• Auth with wrong password

• Auth with correct password

• Executing command with after successful auth

[arpitbbhayani]

Thanks for the patch. Couple of pointers.

1. What are the cases where SetPassword would fail? I see that error will cascade from bcrypt, bu what are the scenarios? because if it is highly unlikely, we can get rid of it.
2. Look at LOGGING and reword the log message.

[pankajjs]

Thanks for the patch. Couple of pointers.

1. What are the cases where SetPassword would fail? I see that error will cascade from bcrypt, bu what are the scenarios? because if it is highly unlikely, we can get rid of it.
2. Look at LOGGING and reword the log message.

1. The SetPassword may fail when bcrypt.DefaultCost is not within the valid range which is highly unlikely to happen because it is a predefined constant.
2. The SetPassword may fail when bcrypt fails to perform hashing operation. This can unlikely to happen.

Considering above cases, We can get rid of the check.

[arpitbbhayani]

Awesome. Merged your changes. thanks.