Maven Repository Authentication with API Key

I would like to authenticate to our on premesis ProGet server and a maven feed using an API key. I have attempted to configure the feed like:

        <repository>
            <id>snapshots</id>
            <name>ProGet Snapshots</name>
            <releases>
                <enabled>false</enabled>
                <updatePolicy>always</updatePolicy>
                <checksumPolicy>warn</checksumPolicy>
            </releases>
            <snapshots>
                <enabled>true</enabled>
                <updatePolicy>never</updatePolicy>
                <checksumPolicy>fail</checksumPolicy>
            </snapshots>
            <url>https://proget.domain.com/maven2/snapshots?key=00000000000</url>
            <layout>default</layout>
        </repository>

This results in an authentication error, however. Is this a problem with my settings.xml file, or ProGet?

Thank you,
Justin Griffiths
Geomni, Inc.

Product: ProGet
Version: 5.1.16

Is this "key=" documented anywhere, like as a part of a standard?

You should be able to use the standard username/password authentication for this, but use "api" as the username, and your api key as the password.

Thank you. That worked.

The key=##### is documented in the API, whereas I cannot find anything that says you specify the username as 'api' and the password as the api-key.

Many thanks,
Justin

Thanks Justin; we definitely need to improve docs. I just made a change to it now to clarify this better: https://github.com/Inedo/inedo-docs/blob/master/ProGet/feeds/maven.htm