add authentication support
add unit test
fix last line strange char
fix last line strange char
Merge pull request #18 from alberts-tid/develop

javadoc
Merge pull request #19 from alberts-tid/task/add_auth_support

Task/add auth support
modify thrown exception
Merge pull request #20 from alberts-tid/task/add_auth_support

modify thrown exception
change exception for a 401 on error
Merge pull request #21 from alberts-tid/task/add_auth_support

change exception for a 401 on error