Fixing "Permission denied (publickey)"

 Error: RROR] Failed to execute goal org.apache.maven.plugins:maven-scm-publish-plugin:3.3.0:publish-scm (default-cli) on project ristretto: Failed to check out from SCM: The git-clone command failed. Cloning into 'scmpublish-checkout'...
Error: RROR] thomasleplus:********@github.com: Permission denied (publickey).
Error: RROR] fatal: Could not read from remote repository.
Error: RROR]
Error: RROR] Please make sure you have the correct access rights
Error: RROR] and the repository exists.
Error: RROR] -> [Help 1]

pom.xml

@@ -49,7 +49,7 @@ limitations under the License.
   </distributionManagement>
   <scm>
     <url>https://github.com/leplusorg/ristretto</url>
-    <connection>scm:git:https://github.com/leplusorg/ristretto.git</connection>
+    <connection>scm:git:ssh://git@github.com/leplusorg/ristretto.git</connection>
     <developerConnection>scm:git:ssh://[email protected]/leplusorg/ristretto.git</developerConnection>
     <tag>HEAD</tag>
   </scm>