gistfile1.xml

<google-contacts:config-with-oauth name="Google_Contacts" consumerKey="${consumerKey}" consumerSecret="${consumerSecret}">
  <google-contacts:oauth-callback-config domain="localhost" localPort="${https.port}" path="oauth2callback" connector-ref="https.connector" />
</google-contacts:config-with-oauth>

<objectstore:config name="tenantStore" partition="tenants" persistent="true" />
    
<flow name="authorize">
  <https:inbound-endpoint path="authorize" port="${https.port}" exchange-pattern="request-response" />
  <flow-ref name="loadTenantInformation" />
  <google-contacts:authorize config-ref="Google_Contacts" />
  <choice>
    <when expression="flowVars['GOOGLE_USER_EMAIL'] != flowVars['tenantInfo']['email']">
      <flow-ref name="rejectAndReportInvalidAuth" />
    </when>
    <otherwise>
      <logger message="successfully authorized tenant" />
    </otherwise>
  </choice>
</flow>

<sub-flow>
  <enricher target="#[flowVars['tenantInfo']]">
    <objectstore:retrieve config-ref="tenantStore" key="#[message.inboundProperties['cookies']['tenantId']]" />  
  </enricher>
</sub-flow>