diff --git a/src/components/AuthUser/SignInForm/fetchCookie.ts b/src/components/AuthUser/SignInForm/fetchCookie.ts
index ee89a0ef6b540b7819de2318c485d7a5b3e0a331..206d307c8c59049e41bd9795e8547394f4054428 100644
--- a/src/components/AuthUser/SignInForm/fetchCookie.ts
+++ b/src/components/AuthUser/SignInForm/fetchCookie.ts
@@ -1,5 +1,11 @@
 import axios from 'axios';
 
+/**
+ *
+ * Ask and set csrf cookie to server.
+ * @param setIsCookieFetched function to set the state isCookieFetched.
+ * @returns null
+ */
 export const fetchCookie = async (
   setIsCookieFetched: React.Dispatch<React.SetStateAction<string>>,
 ): Promise<unknown> => {