finishing auth first draft

Author: arcuri82

src/main/resources/wfc/schemas/auth.yaml

@@ -119,7 +119,17 @@ $def:
                   Not needed if rather expect to get back a cookie."
     type: object
     properties:
-      ### TODO
+      extractFromField:
+        description: "How to extract the token from a JSON response, as such JSON could have few fields, possibly nested. \
+                      It is expressed as a JSON Pointer (RFC 6901)."
+        type: string
+      httpHeaderName:
+        description: "When sending a token in an HTTP header, specify to which header to add it (e.g., 'Authorization')."
+        type: string
+      headerPrefix:
+        description: " When sending out the obtained token in an HTTP header, specify if there should be any \ 
+                       prefix (e.g., 'Bearer ' or 'JWT '). If needed, make sure it has trailing space(s)."
+        type: string
   ###
   PayloadUsernamePassword:
     description: "Payload with username and password information. \