Your repository configuration (URL) is probably wrong, look at this page:
http://maven.apache.org/guides/mini/guide-encryption.html (encryption is optional)
All what you need is to put password to $HOME/.m2/settings.xml
<settings>
...
<servers>
...
<server>
<id>arved-repository</id>
<username>arved</username>
<password>passw0rd</password>
</server>
...
</servers>
...
</settings>
And configure repository in pom.xml using defined earlier server.id:
<project>
...
<repositories>
<repository>
<id>arved-repository</id>
<name>Arved Repository</name>
<url>https://maven.arved.at/content/groups/arved</url>
</repository>
...
</project>