How to setup Social Link authentication

[NayanKhedkar]

Issue type

I'm submitting a ... (check one with "x")

• bug report
• feature request

Issue description

Current behavior:

Example of Social Link authentication is not available.
Expected behavior:

Example of Social Link authentication with sample implementation.
Steps to reproduce:

NA
Related code:

insert short code snippets here

Other information:

npm, node, OS, Browser

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Angular, Nebular

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