auth, trips and join trips

lib/prisma.ts

@@ -0,0 +1,19 @@
+import { PrismaClient } from "@/app/generated/prisma/client";
+import { PrismaPg } from "@prisma/adapter-pg";
+
+const globalForPrisma = globalThis as unknown as {
+  prisma: PrismaClient | undefined;
+};
+
+function createPrismaClient() {
+  const adapter = new PrismaPg({
+    connectionString: process.env.DATABASE_URL!,
+  });
+  return new PrismaClient({ adapter });
+}
+
+export const prisma = globalForPrisma.prisma ?? createPrismaClient();
+
+if (process.env.NODE_ENV !== "production") {
+  globalForPrisma.prisma = prisma;
+}