feat(credentials): Add PasswordAttributes credential type (#6110)

internal/proto/controller/api/resources/credentials/v1/credential.proto

@@ -157,6 +157,28 @@ message UsernamePasswordDomainAttributes {
   ]; // @gotags: `class:"public"`
 }
 
+// The attributes of a Password Credential.
+message PasswordAttributes {
+  // Input only. The password associated with the credential.
+  google.protobuf.StringValue password = 10 [
+    json_name = "password",
+    (custom_options.v1.generate_sdk_option) = true,
+    (custom_options.v1.mask_mapping) = {
+      this: "attributes.password"
+      that: "Password"
+    }
+  ]; // @gotags: `class:"secret"`
+
+  // Output only. The hmac value of the password.
+  string password_hmac = 20 [
+    json_name = "password_hmac",
+    (custom_options.v1.mask_mapping) = {
+      this: "attributes.password_hmac"
+      that: "PasswordHmac"
+    }
+  ]; // @gotags: `class:"public"`
+}
+
 // The attributes of a SshPrivateKey Credential.
 message SshPrivateKeyAttributes {
   // The username associated with the credential.