I followed the simple workflow tutorial by " http://ecmarchitect.com/alfresco-developer-series-tutorials/workflow/tutorial/tutorial.html" i am getting this error Please assist

i have uploaded the error i am getting please help me with this

[INFO] ------------------------------------------------------------------------

[INFO] Reactor Summary for AIO - SDK 3.0 1.0-SNAPSHOT:

[INFO]

[INFO] AIO - SDK 3.0 ...................................... FAILURE [ 23.188 s]

[INFO] Alfresco Platform/Repository JAR Module ............ SUCCESS [ 10.205 s]

[INFO] Alfresco Share JAR Module .......................... SUCCESS [  1.298 s]

[INFO] Integration Tests Module ........................... SUCCESS [  2.786 s]

[INFO] ------------------------------------------------------------------------

[INFO] BUILD FAILURE

[INFO] ------------------------------------------------------------------------

[INFO] Total time:  39.017 s

[INFO] Finished at: 2018-12-10T14:36:33+05:30

[INFO] ------------------------------------------------------------------------

[ERROR] Failed to execute goal org.alfresco.maven.plugin:alfresco-maven-plugin:3.0.1:run (default-cli) on project workflow: Unable to execute mojo: Unable to resolve artifact. Could not transfer artifact com.tcs:content-tutorial-platform-jar:amp:1.0-SNAPSHOT from/to alfresco-private-repository (https://artifacts.alfresco.com/nexus/content/groups/private): Not authorized

[ERROR]   com.tcs:content-tutorial-platform-jar:amp:1.0-SNAPSHOT

[ERROR]

[ERROR] from the specified remote repositories:

[ERROR]   alfresco-public (https://artifacts.alfresco.com/nexus/content/groups/public, releases=true, snapshots=true),

[ERROR]   alfresco-public-snapshots (https://artifacts.alfresco.com/nexus/content/groups/public-snapshots, releases=true, snapshots=true),

[ERROR]   alfresco-private-repository (https://artifacts.alfresco.com/nexus/content/groups/private, releases=true, snapshots=true),

[ERROR]   central (https://repo.maven.apache.org/maven2, releases=true, snapshots=false)

[ERROR] -> [Help 1]

[ERROR]

[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.

[ERROR] Re-run Maven using the -X switch to enable full debug logging.

[ERROR]

[ERROR] For more information about the errors and possible solutions, please read the following articles:

[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException