feat: design applications and first api calls

Co-authored-by: Walid <87608619+WalidKorchi@users.noreply.github.com>

cypress/fixtures/users/signup/post.ts

@@ -0,0 +1,30 @@
+import { Handler } from '../../handler'
+
+import { user, userSettings } from '../user'
+
+export const postUsersSignupHandler: Handler = {
+  method: 'POST',
+  url: '/users/signup',
+  response: {
+    statusCode: 201,
+    body: {
+      user: {
+        ...user,
+        settings: userSettings
+      }
+    }
+  }
+}
+
+export const postUsersSignupAlreadyUsedHandler: Handler = {
+  method: 'POST',
+  url: '/users/signup',
+  response: {
+    statusCode: 400,
+    body: {
+      statusCode: 400,
+      error: 'Bad Request',
+      message: 'body.email or body.name already taken.'
+    }
+  }
+}