Update api.tsx

Add resource to check whether usernames and emails exist

src/utils/api.tsx

@@ -45,11 +45,17 @@ class Api {
         } as EndpointMap
     }
 
-
     search(query: string) {
         const resourceUrl = `${this.url}/${name}`
         return axios.get(`${resourceUrl}/search?query=${query}`)
     }
+
+    check(resource: string, value: string) {
+        const resourceUrl = `${this.url}/check/${resource}`
+        return axios.post(resourceUrl, {
+            [resource]: value
+        })
+    }
 }
 
 const api: Api = new Api({ url: process.env.SIERO_API_URL || 'http://127.0.0.1:3000/api/v1' })