Flask API: Update User Information route

[ExoMonk]

• From feat/backend branch, create your own

Create/update an endpoint under the starklings-backend/starklings-backend/route.py file to update user information given a wallet address, and a signature and inserting it to the MySQL Database (starklings_user) :

/updateUser
:param wallet_address
:param signature

return:
{
  'result': newUserData
}

Pull Request on feat/backend