Configuring HTTP Basic Auth secured repository is a little bit hard. Just remember the following things:

For simplicity we use the same login value for everyone - myMavenRepo.
You should use read URL with read password and write URL with write password. You can't use read URL with write password.
There is difference between repository credentials and service credentials. Don't mess them up.

Help / Configuring Maven pom.xml file for HTTP Basic Auth secured repository

Security

Let's specify password to your repositories in ~/.m2/settings.xml

<settings>
    <servers>
        <server>
            <id>myMavenRepo.read</id>
            <username>myMavenRepo</username>
            <password>${yourHttpAuthReadPassword}</password>
        </server>
        <server>
            <id>myMavenRepo.write</id>
            <username>myMavenRepo</username>
            <password>${yourHttpAuthWritePassword}</password>
        </server>
    </servers>
</settings>

Replace ${yourHttpAuthReadPassword}, ${yourHttpAuthWritePassword} with corresponding password values.

Get more info: official documentation

Reading

Since your repository is protected by HTTP Basic Auth you can directly use read URL in your /path/to/project/pom.xml file:

<project>
    ...
    <repositories>
        <repository>
            <id>myMavenRepo.read</id>
            <url>${myMavenRepo.read.url}</url>
        </repository>
    </repositories>
    ...
</project>

Replace ${myMavenRepo.read.url} with your read repository URL.

Get more info: official documentation

Publishing artifacts

Since your repository is protected by HTTP Basic Auth you can directly use write URL in your /path/to/project/pom.xml file:

<project>
    ...
    <distributionManagement>
        <repository>
            <id>myMavenRepo.write</id>
            <url>${myMavenRepo.write.url}</url>
        </repository>
    </distributionManagement>
    ...
</project>

Replace ${myMavenRepo.write.url} with your write repository URL.

To upload artifacts use mvn deploy command.

Get more info: official documentation