java无法获取POM中提供的密码。xml插件配置

Question

我在我的项目中编写了一个java类脚本文件。我已经在POM中提供了必要的配置。xml。我在使用flywaydb上下文方法的java类中使用了这个提供的密码和用户名，但当我试图获取它时，它给了我null。为什么？有什么建议吗

 <plugins>
                    <plugin>
                        <groupId>org.flywaydb</groupId>
                        <artifactId>flyway-maven-plugin</artifactId>
                        <version>7.3.1</version>
                        <configuration>
                            <url>jdbc:postgresql://localhost:5432/eppmdb_integration</url>
                            <user>eppm</user>
                            <password>{Pass@123}</password>
                            <table>flyway_schema_version</table>
                            <outOfOrder>true</outOfOrder>
                            <placeholders>
                                <eppmdb_user>eppm</eppmdb_user>
                                <REALM_CODE>PTPL</REALM_CODE>
                                <eppmdb_pass>Pass@123</eppmdb_pass>
                            </placeholders>
                            <locations>
                                <location>filesystem:src/main/resources/db/migration/eppm</location>
                                <location>classpath:com/paramatrix/eppm/db/migration</location>
                            </locations>
                        </configuration>
       </plugin>
    </plugins>