Created Request.parseJWT extension method

Sources/Helpers/Request+JWT.swift

@@ -0,0 +1,17 @@
+import HTTP
+import JWT
+import AuthProvider
+
+extension Request {
+    func parseJWT() throws -> JWT {
+        guard let authHeader = auth.header else {
+            throw AuthenticationError.noAuthorizationHeader
+        }
+        
+        guard let bearer = authHeader.bearer else {
+            throw AuthenticationError.invalidBearerAuthorization
+        }
+        
+        return try JWT(token: bearer.string)
+    }
+}