Configure client id and client secret in the config file

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=224158599

java/google/registry/config/RegistryConfig.java

@@ -1258,15 +1258,18 @@ public final class RegistryConfig {
       return "/tos";
     }
 
-    /**
-     * Returns the name of the OAuth2 client secrets file.
-     *
-     * <p>This is the name of a resource relative to the root of the class tree.
-     */
+    /** OAuth client ID used by the nomulus tool. */
     @Provides
-    @Config("clientSecretFilename")
-    public static String provideClientSecretFilename(RegistryConfigSettings config) {
-      return config.registryTool.clientSecretFilename;
+    @Config("toolsClientId")
+    public static String provideToolsClientId(RegistryConfigSettings config) {
+      return config.registryTool.clientId;
+    }
+
+    /** OAuth client secret used by the nomulus tool. */
+    @Provides
+    @Config("toolsClientSecret")
+    public static String provideToolsClientSecret(RegistryConfigSettings config) {
+      return config.registryTool.clientSecret;
     }
 
     @Provides
@@ -1551,12 +1554,6 @@ public final class RegistryConfig {
     return Duration.standardDays(CONFIG_SETTINGS.get().registryPolicy.contactAutomaticTransferDays);
   }
 
-  /** Provided for testing. */
-  @VisibleForTesting
-  public static String getClientSecretFilename() {
-    return CONFIG_SETTINGS.get().registryTool.clientSecretFilename;
-  }
-
   /**
    * Memoizes loading of the {@link RegistryConfigSettings} POJO.
    *

java/google/registry/config/RegistryConfigSettings.java

@@ -182,6 +182,7 @@ public class RegistryConfigSettings {
 
   /** Configuration options for the registry tool. */
   public static class RegistryTool {
-    public String clientSecretFilename;
+    public String clientId;
+    public String clientSecret;
   }
 }

java/google/registry/config/files/default-config.yaml

@@ -257,8 +257,8 @@ oAuth:
     - https://www.googleapis.com/auth/userinfo.email
 
   # OAuth client IDs that are allowed to authenticate and communicate with
-  # backend services, e. g. nomulus tool, EPP proxy, etc. All client_id values
-  # used in client_secret.json files for associated tooling should be included
+  # backend services, e. g. nomulus tool, EPP proxy, etc. The client_id value
+  # used in registryTool.clientId field for associated tooling should be included
   # in this list. Client IDs are typically of the format
   # numbers-alphanumerics.apps.googleusercontent.com
   allowedOauthClientIds: []
@@ -388,5 +388,7 @@ keyring:
 
 # Configuration options relevant to the "nomulus" registry tool.
 registryTool:
-  # Name of the client secret file used for authenticating with App Engine.
-  clientSecretFilename: /google/registry/tools/resources/client_secret.json
+  # OAuth client Id used by the tool.
+  clientId: YOUR_CLIENT_ID
+  # OAuth client secret used by the tool.
+  clientSecret: YOUR_CLIENT_SECRET