set postgres password properly(?)

argocd/postgres/values.yaml

@@ -145,7 +145,7 @@ auth:
   replicationPassword: ""
   ## @param auth.existingSecret Name of existing secret to use for PostgreSQL credentials. `auth.postgresPassword`, `auth.password`, and `auth.replicationPassword` will be ignored and picked up from this secret. The secret might also contains the key `ldap-password` if LDAP is enabled. `ldap.bind_password` will be ignored and picked from this secret in this case.
   ##
-  existingSecret: ""
+  existingSecret: "postgres-password"
   ## @param auth.secretKeys.adminPasswordKey Name of key in existing secret to use for PostgreSQL credentials. Only used when `auth.existingSecret` is set.
   ## @param auth.secretKeys.userPasswordKey Name of key in existing secret to use for PostgreSQL credentials. Only used when `auth.existingSecret` is set.
   ## @param auth.secretKeys.replicationPasswordKey Name of key in existing secret to use for PostgreSQL credentials. Only used when `auth.existingSecret` is set.