anchor.diff:            "error": "unauthorized",
             "reason": "You are not authorized to use the api"
           }
  -        
  +
   + Request
  -    
  -    + Headers 
  -    
  +
  +    + Headers
  +
               X-API-Key: correct-key
   
   
  
positive.code:           "anneeImpots": "2015",
            "anneeRevenus": "2014"
          }
          
  + Request 
  
      + Headers 
  
              X-API-Key: badKey
  
  
negative.code: 
  ### Affiche une déclaration [GET]
  
  + Request
  
      + Headers
  
              X-API-Key: <api-key>
  
  