Updated sign up interface

front/src/hooks/api/useSignUp.ts

@@ -1,6 +1,6 @@
 import { useSendWithButton } from '..'
 import { composeSignUpURL, processSignUp } from '../../api/signup'
-import { SignUpBody, isSignUpResponse } from '../../api/signup/types'
+import { isSignUpResponse } from '../../api/signup/types'
 
 function useSignUp() {
     const { doSend, button } = useSendWithButton(
@@ -14,12 +14,9 @@ function useSignUp() {
         processSignUp,
     )
 
-    async function handleSignUp(data: SignUpBody) {
+    async function handleSignUp(formData: FormData) {
         const res = await doSend({}, {
-            body: JSON.stringify(data),
-            headers: {
-                'Content-Type': 'application/json',
-            },
+            body: formData,
         })
 
         return res ?? false