You can also authenticate with the server using an Access Token.
Create a NuGet repository and follow the setmeup page.
Instead of passing the user credentials in the URL, pass the Artifactory Access Token.
Note that the following also use Access Tokens:
nuget sources Add -Name <SourceName> -Source <ArtifactoryURL/artifactory/api/nuget/ctie-mobile-snapshots>
nuget setapikey <ACCESSTOKEN> -Source <SourceName>