Could not get unknown property 'ossrhUsername'

[aquaplanet]

~/Codemint/Karl/JDocker(branch:master*) » ./gradlew tasks
megaman@paperweight

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/megaman/Codemint/Karl/JDocker/build.gradle' line: 100

* What went wrong:
A problem occurred evaluating root project 'docker-client'.
> Could not get unknown property 'ossrhUsername' for object of type
org.gradle.api.publication.maven.internal.deployer.DefaultGroovyMavenDeployer.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more
log output.

BUILD FAILED

Total time: 0.848 secs

Mac OS 10.11.6

~/Codemint/Karl/JDocker(branch:master*) » ./gradlew --version

------------------------------------------------------------
Gradle 3.1
------------------------------------------------------------

Build time:   2016-09-19 10:53:53 UTC
Revision:     13f38ba699afd86d7cdc4ed8fd7dd3960c0b1f97

Groovy:       2.4.7
Ant:          Apache Ant(TM) version 1.9.6 compiled on June 29 2015
JVM:          1.8.0_91 (Oracle Corporation 25.91-b14)
OS:           Mac OS X 10.11.6 x86_64

commit e283ab8

Workaround: comment uploadArchives.

[Khazrak]

Added comment in Readme how to fix this @aquaplanet