Create New Backend Service to Interact with Keycloak

[kgudel]

Service should:

• Confirm a users token

• Determine a users ID from the token

• Confirm which institutions a user should be able to be associated with by checking their email domain in the token against the institutions_emails table

• Enable a user to update the account associated with their token in the following ways:

  • Update their lei attribute based on the institutions associated with their email domain, both to remove and add institutions. Specifically by updating their account's lei attribute.
  • Update their first and last name