Fix error handling in login process

[ravilodhi]

Currently, most of the OMS APIs return an error object in case of failure. However, the error is treated as a string in error handling. Please enhance the error handling to consider both the error pattern so that messages like [object, object] can be avoided.

[Adameddy26]

Issue verified in fulfillment app release v2.0.3 and found that issue is not fixed properly.

[Adameddy26]

Verified this issue for import app release v2.15.0 and found that issue is working fine.

[Adameddy26]

Issue verified and working fine in facilities app release v1.5.0.