diff --git a/components/InstallApp.tsx b/components/InstallApp.tsx
index f191f00..50071da 100644
--- a/components/InstallApp.tsx
+++ b/components/InstallApp.tsx
@@ -8,7 +8,7 @@ const InstallApp = (props: Props) => {
   const [isOpen, setIsOpen] = useState(true);
 
   return isOpen && !isPWA() ? (
-    <div className="fixed left-0 right-0 bottom-10 w-full p-5">
+    <div className="fixed left-0 right-0 bottom-10 w-full">
       <div className="mx-auto w-fit p-2 flex justify-between gap-2 items-center border border-neutral-content rounded-xl bg-base-300 backdrop-blur-md bg-opacity-80 max-w-md">
         <svg
           xmlns="http://www.w3.org/2000/svg"
diff --git a/pages/api/v1/auth/[...nextauth].ts b/pages/api/v1/auth/[...nextauth].ts
index 7b6315f..8b97c04 100644
--- a/pages/api/v1/auth/[...nextauth].ts
+++ b/pages/api/v1/auth/[...nextauth].ts
@@ -1179,14 +1179,14 @@ export default async function auth(req: NextApiRequest, res: NextApiResponse) {
     },
     callbacks: {
       async signIn({ user, account, profile, email, credentials }) {
-        if (account?.provider !== "credentials") {
+        if (account?.provider !== "credentials" && newSsoUsersDisabled) {
           // registration via SSO can be separately disabled
           const existingUser = await prisma.account.findFirst({
             where: {
               providerAccountId: account?.providerAccountId,
             },
           });
-          if (!existingUser && newSsoUsersDisabled) {
+          if (!existingUser) {
             return false;
           }
         }
@@ -1217,6 +1217,22 @@ export default async function auth(req: NextApiRequest, res: NextApiResponse) {
               },
             });
           }
+        } else if (trigger === "signIn") {
+          const user = await prisma.user.findUnique({
+            where: {
+              id: token.id,
+            },
+          });
+
+          if (user && !user.username) {
+            const autoGeneratedUsername =
+              "user" + Math.round(Math.random() * 1000000000);
+
+            await prisma.user.update({
+              where: { id: user.id },
+              data: { username: autoGeneratedUsername },
+            });
+          }
         }
 
         return token;