if (userinfo) {
          const usernameBuffer = Buffer.from(userinfo.data.username);
          const encodedUsername = usernameBuffer.toString("base64");

          cookies().set("Username", encodedUsername, {
            httpOnly: true,
            secure: process.env.NODE_ENV === "production",
            sameSite: "strict",
          });

          const json = await prisma.user.create({
            data: {
              Discord: userinfo.data.username,
              User_ID: userinfo.data.id,
              Banner: userinfo.data.avatar,
              Buyer: true,
            },
          });

          return NextResponse.json(json, { status: 201 });
        }

        return NextResponse.redirect("http://localhost:3000/");
      }

Error: No response is returned from route handler
What he mean not return????