Maven error: Not authorized, ReasonPhrase:Unauthorized

The issue may happen while fetching dependencies from a remote repository. In my case, the repository did not need any authentication and it has been resolved by removing the servers section in the settings.xml file:

<servers>
    <server>
      <id>SomeRepo</id>
      <username>SomeUN</username>
      <password>SomePW</password>
    </server>
</servers>

ps: I guess your target is mvn clean install instead of maven install clean

I have recently encountered this problem. Here are the steps to resolve

1. Check the servers section in the settings.xml file.Is username and password correct?

<servers>
  <server>
    <id>serverId</id>
    <username>username</username>
    <password>password</password>
  </server>
</servers>

2. Check the repository section in the pom.xml file.The id of the server tag should be the same as the id of the repository tag.

<repositories>
	<repository>
	  <id>serverId</id>  
	  <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
	</repository>
</repositories>

3. If the repository tag is not configured in the pom.xml file, look in the settings.xml file.

<profiles>
	<profile>
	  <repositories>
	    <repository>
		    <id>serverId</id>
		    <name>aliyun</name>
		    <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
	    </repository>
	  </repositories>
	</profile>
</profiles>

Note that you should ensure that the id of the server tag should be the same as the id of the repository tag.

The problem here was a typo error in the password used, which was not easily identified due to the characters / letters used in the password.