Add validate user route

tests/Users/Validate User.bru

@@ -0,0 +1,21 @@
+meta {
+  name: Validate User
+  type: http
+  seq: 5
+}
+
+post {
+  url: http://localhost:8000/api/users/5/validate
+  body: none
+  auth: inherit
+}
+
+headers {
+  Accept: application/json
+  X-XSRF-TOKEN: 
+}
+
+settings {
+  encodeUrl: true
+  timeout: 0
+}