added the ability to disable registration

.env.sample

@@ -7,6 +7,7 @@ NEXTAUTH_URL=http://localhost:3000
 PAGINATION_TAKE_COUNT=
 STORAGE_FOLDER=
 AUTOSCROLL_TIMEOUT=
+NEXT_PUBLIC_DISABLE_REGISTRATION=
 
 # AWS S3 Settings
 SPACES_KEY=

pages/api/auth/register.ts

@@ -20,6 +20,10 @@ export default async function Index(
   req: NextApiRequest,
   res: NextApiResponse<Data>
 ) {
+  if (process.env.NEXT_PUBLIC_DISABLE_REGISTRATION === "true") {
+    return res.status(400).json({ response: "Registration is disabled." });
+  }
+
   const body: User = req.body;
 
   const checkHasEmptyFields = emailEnabled

pages/login.tsx

@@ -97,6 +97,7 @@ export default function Login() {
           className=" w-full text-center"
           loading={submitLoader}
         />
+        {process.env.NEXT_PUBLIC_DISABLE_REGISTRATION === "true" ? undefined : (
           <div className="flex items-baseline gap-1 justify-center">
             <p className="w-fit text-gray-500 dark:text-gray-400">New here?</p>
             <Link
@@ -106,6 +107,7 @@ export default function Login() {
               Sign Up
             </Link>
           </div>
+        )}
       </div>
     </CenteredForm>
   );

pages/register.tsx

@@ -99,6 +99,14 @@ export default function Register() {
           : "Create a new account"
       }
     >
+      {process.env.NEXT_PUBLIC_DISABLE_REGISTRATION === "true" ? (
+        <div className="p-4 flex flex-col gap-3 justify-between sm:w-[30rem] w-80 bg-slate-50 dark:bg-neutral-800 rounded-2xl shadow-md border border-sky-100 dark:border-neutral-700">
+          <p>
+            Registration is disabled for this instance, please contact the admin
+            in case of any issues.
+          </p>
+        </div>
+      ) : (
         <div className="p-4 flex flex-col gap-3 justify-between sm:w-[30rem] w-80 bg-slate-50 dark:bg-neutral-800 rounded-2xl shadow-md border border-sky-100 dark:border-neutral-700">
           <p className="text-2xl text-black dark:text-white text-center font-bold">
             Enter your details
@@ -227,6 +235,7 @@ export default function Register() {
             </Link>
           </div>
         </div>
+      )}
     </CenteredForm>
   );
 }

types/enviornment.d.ts

@@ -4,6 +4,7 @@ declare global {
       NEXTAUTH_SECRET: string;
       DATABASE_URL: string;
       NEXTAUTH_URL: string;
+      NEXT_PUBLIC_DISABLE_REGISTRATION?: string;
       PAGINATION_TAKE_COUNT?: string;
       STORAGE_FOLDER?: string;
       AUTOSCROLL_TIMEOUT?: string;