Failed to execute goal on project wechaty-examples: Could not resolve dependencies

[chengaopan]

[INFO] Scanning for projects...
[INFO]
[INFO] -----------------< io.github.wechaty:wechaty-examples >-----------------
[INFO] Building wechaty-examples 1.0.0-SNAPSOHOT
[INFO] --------------------------------[ jar ]---------------------------------
Downloading from mvnrepository: http://www.mvnrepository.com/io/wechaty/wechaty/1.0.0-SNAPSOHOT/wechaty-1.0.0-SNAPSOHOT.pom
Downloading from github: https://maven.pkg.github.com/diaozxin007/java-wechaty/io/wechaty/wechaty/1.0.0-SNAPSOHOT/wechaty-1.0.0-SNAPSOHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.770 s
[INFO] Finished at: 2020-05-22T11:00:15+08:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project wechaty-examples: Could not resolve dependencies for project io.github.wechaty:wechaty-examples:jar:1.0.0-SNAPSOHOT: Failed to collect dependencies at io.wechaty:wechaty:jar:1.0.0-SNAPSOHOT: Failed to read artifact descriptor for io.wechaty:wechaty:jar:1.0.0-SNAPSOHOT: Could not transfer artifact io.wechaty:wechaty:pom:1.0.0-SNAPSOHOT from/to mvnrepository (http://www.mvnrepository.com/): Transfer failed for http://www.mvnrepository.com/io/wechaty/wechaty/1.0.0-SNAPSOHOT/wechaty-1.0.0-SNAPSOHOT.pom 503 Service Temporarily Unavailable -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException

[huan]

Transfer failed for http://www.mvnrepository.com/io/wechaty/wechaty/1.0.0-SNAPSOHOT/wechaty-1.0.0-SNAPSOHOT.pom 503 Service Temporarily Unavailable -> [Help 1]

It seems this case is a service failure from Maven?