Complete adding GCP GCE auth

backend/src/services/identity-gcp-auth/identity-gcp-auth-validators.ts

@@ -0,0 +1,24 @@
+import { z } from "zod";
+
+import { IdentityGcpAuthsSchema } from "@app/db/schemas";
+
+export const ModifiedIdentityGcpAuthsSchema = IdentityGcpAuthsSchema.omit({
+  encryptedCredentials: true,
+  credentialsIV: true,
+  credentialsTag: true
+}).extend({
+  credentials: z.string()
+});
+
+export const validateGcpAuthField = z
+  .string()
+  .trim()
+  .default("")
+  .transform((data) => {
+    if (data === "") return "";
+    // Trim each ID and join with ', ' to ensure formatting
+    return data
+      .split(",")
+      .map((id) => id.trim())
+      .join(", ");
+  });