anchor.diff:  (def tokens {:2f904e245c1f5 :admin
                :45c1f5e3f05d0 :foouser})
   
  -;; Define a authfn, function with the responsibility
  +;; Define an authfn, function with the responsibility
   ;; to authenticate the incoming token and return an
   ;; identity instance
   
  
positive.code: {"token":"eyJhbGciOiJBMjU2S1ciLCJ0eXAiOiJKV1MiLCJlbmMiOiJBMTI4R0NNIn0.Q672y_lD3bOU_qm5U0RDKS-YszRHfkFu.vDZaAJPz8uL5q1A4.LonJtHZMA_Ty53YBmr1zpE7-SIbTJgVgme--Tjj25dHN.goYEyM3JZgYlbARo8CDk0g"}
  ----
  
  .Perform an autenticated request (using previously obtained token).
  [source, text]
  ----
  $ curl -v -X GET -H "Content-Type: application/json" -H "Authorization: Token eyJhbGciOiJBMjU2S1ciLCJ0eXAiOiJKV1MiLCJlbmMiOiJBMTI4R0NNIn0.Q672y_lD3bOU_qm5U0RDKS-YszRHfkFu.vDZaAJPz8uL5q1A4.LonJtHZMA_Ty53YBmr1zpE7-SIbTJgVgme--Tjj25dHN.goYEyM3JZgYlbARo8CDk0g" http://localhost:3000/
  
negative.code: 
  The *authfn* will be called only if the *parse* process returns not `nil`.
  
  Finally, you should wrap your ring handler with authentication middleware:
  
  [source,clojure]
  ----
  