Client username support 🚀

[divyanshu-rawat]

Is your feature request related to a problem? Please describe.
We have decided to add username support to Ignitus.
Currently, the ignitus-server has an open PR to add username support to the Ignitus web application.
Here is the PR - Ignitus/Ignitus-rest-api#154

Implementation can be divide into 2 steps:
1 - Add username support to signUp.
2 - Add username support to logIn.

1st one can be achieved by adding an additional Input on signUp page http://www.ignitus.org/signup/student, http://www.ignitus.org/signup/professor.

Here is the file that shares component between signUp & logIn pages https://github.com/Ignitus/Ignitus-client/blob/master/src/ignitus-Shared/ignitus-DesignSystem/ignitus-Templates/ignitus-Authentication/Components/SplittedComponents/FormComponent/index.tsx.

In the IInd one keep in mind you don't need to add any field, we want the user to enter either email or username, something like email/username.
Please go through back end implementation before starting to work on this issue.

Describe the solution you'd like

• Signup should contain an Input to ask for username during regestration.
• LogIn should take either the email or username.

Describe alternatives you've considered
N.A

Additional context
Source Code of authentication

Please let me know if you have any Questions regarding this issue we can have a conversation here or on slack. 🚀