fix: add copyright to getCredentialsCommand

Author: mustafasalfiti

src/main/java/org/eclipse/tractusx/managedidentitywallets/command/GetCredentialsCommand.java

@@ -1,3 +1,24 @@
+/*
+ * *******************************************************************************
+ *  Copyright (c) 2021,2023 Contributors to the Eclipse Foundation
+ *
+ *  See the NOTICE file(s) distributed with this work for additional
+ *  information regarding copyright ownership.
+ *
+ *  This program and the accompanying materials are made available under the
+ *  terms of the Apache License, Version 2.0 which is available at
+ *  https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ *  License for the specific language governing permissions and limitations
+ *  under the License.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ * ******************************************************************************
+ */
+
 package org.eclipse.tractusx.managedidentitywallets.command;
 
 import java.util.List;