Create a module to create & verify social proofs

[satazor]

Description

Create a module to create social proofs on Facebook and Twitter. If it's easy, also support LinkedIn and GitHub. The proof is a cryptographic signature that is posted publicly on the social accounts, linking the identities' DID.

Acceptance Criteria

• [ ] Ability to create proofs that link a social profile to an identity DID a Facebook and Twitter accounts
• [ ] Ability to verify the same proofs
• [ ] Bonus: support LinkedIn and GitHub