Add API functionality to Sticker Module

[kallyas]

• Please check if the PR fulfills these requirements

• [ ] Tests for the changes have been added (for bug fixes/features)

• [ ] Docs have been added / updated (for bug fixes / features)

• [x] I have included in this PR's description the statement closes #xx or fixes #xx where #xx is the number of the issue being addressed.

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...) This PR Adds API functionality to Sticker Module closes #154

• What is the current behavior? (You can also link to an open issue here)

• What is the new behavior (if this is a feature change)?

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

• Other information:

[TobiasHT5]

@kallyas so far I don't see anything out of place. So you can go ahead and merge this, maybe I'll pick up something during testing