How to use the pygit2.Signature function in pygit2

newpath = tempfile.mkdtemp(prefix='pagure-fork-test')
        gitrepo = os.path.join(
            self.path, 'repos', 'forks', 'foo', 'test.git')
        new_repo = pygit2.clone_repository(gitrepo, newpath)

        # Edit the sources file again
        with open(os.path.join(newpath, 'sources'), 'w') as stream:
            stream.write('foo\n bar\nbaz\n boose')
        new_repo.index.add('sources')
        new_repo.index.write()

        # Commits the files added
        tree = new_repo.index.write_tree()
        author = pygit2.Signature(
            'Alice Author', 'alice@authors.tld')
        committer = pygit2.Signature(
            'Cecil Committer', 'cecil@committers.tld')
        new_repo.create_commit(
            'refs/heads/feature',
            author,
            committer,
            'A commit on branch feature',
            tree,
            []
        )
        refname = 'refs/heads/feature:refs/heads/feature'
        ori_remote = new_repo.remotes[0]
        PagureRepo.push(ori_remote, refname)

        # Create a PR for these "changes" (there are none, both repos are
        # empty)
        project = pagure.get_authorized_project(self.session, 'test')

)
        refname = "refs/heads/master:refs/heads/master"
        ori_remote = clone_repo.remotes[0]
        PagureRepo.push(ori_remote, refname)

        first_commit = repo.revparse_single("HEAD")

        if mtype == "merge":
            with open(os.path.join(repopath, ".gitignore"), "w") as stream:
                stream.write("*~")
            clone_repo.index.add(".gitignore")
            clone_repo.index.write()

            # Commits the files added
            tree = clone_repo.index.write_tree()
            author = pygit2.Signature("Alice Äuthòr", "alice@äuthòrs.tld")
            committer = pygit2.Signature(
                "Cecil Cõmmîttër", "cecil@cõmmîttërs.tld"
            )
            clone_repo.create_commit(
                "refs/heads/master",
                author,
                committer,
                "Add .gitignore file for testing",
                # binary string representing the tree object ID
                tree,
                # list of binary strings representing parents of the new commit
                [first_commit.oid.hex],
            )
            refname = "refs/heads/master:refs/heads/master"
            ori_remote = clone_repo.remotes[0]
            PagureRepo.push(ori_remote, refname)

repo = pygit2.init_repository(gitrepo, bare=True)

        newpath = tempfile.mkdtemp(prefix="pagure-other-test")
        repopath = os.path.join(newpath, "test")
        clone_repo = pygit2.clone_repository(gitrepo, repopath)

        # Create a file in that git repo
        with open(os.path.join(repopath, "sources"), "w") as stream:
            stream.write("foo\n bar")
        clone_repo.index.add("sources")
        clone_repo.index.write()

        # Commits the files added
        tree = clone_repo.index.write_tree()
        author = pygit2.Signature("Alice Author", "alice@authors.tld")
        committer = pygit2.Signature("Cecil Committer", "cecil@committers.tld")
        clone_repo.create_commit(
            "refs/heads/master",  # the name of the reference to update
            author,
            committer,
            "Add sources file for testing",
            # binary string representing the tree object ID
            tree,
            # list of binary strings representing parents of the new commit
            [],
        )
        refname = "refs/heads/master"
        ori_remote = clone_repo.remotes[0]
        PagureRepo.push(ori_remote, refname)

# Create a git repo to play with
        self.gitrepo = os.path.join(self.path, "repos", "test_repo.git")
        os.makedirs(self.gitrepo)
        repo = pygit2.init_repository(self.gitrepo)

        # Create a file in that git repo
        with open(os.path.join(self.gitrepo, "sources"), "w") as stream:
            stream.write("foo\n bar")
        repo.index.add("sources")
        repo.index.write()

        # Commits the files added
        tree = repo.index.write_tree()
        author = pygit2.Signature("Alice Author", "alice@authors.tld")
        committer = pygit2.Signature("Cecil Committer", "cecil@committers.tld")
        repo.create_commit(
            "refs/heads/master",  # the name of the reference to update
            author,
            committer,
            "Add sources file for testing",
            # binary string representing the tree object ID
            tree,
            # list of binary strings representing parents of the new commit
            [],
        )

        self.first_commit = repo.revparse_single("HEAD")

        # Edit the sources file again
        with open(os.path.join(self.gitrepo, "sources"), "w") as stream:
            stream.write("foo\n bar\nbaz\n boose")

# list of binary strings representing parents of the new commit
            [last_commit.oid.hex]
        )

        # Second commit
        with open(os.path.join(repopath, 'testfile'), 'a') as stream:
            stream.write('\nfoo2\n bar2')
        clone_repo.index.add('testfile')
        clone_repo.index.write()

        # Commits the files added
        last_commit = clone_repo.revparse_single('HEAD')
        tree = clone_repo.index.write_tree()
        author = pygit2.Signature(
            'Alice Author', 'alice@authors.tld')
        committer = pygit2.Signature(
            'Cecil Committer', 'cecil@committers.tld')
        clone_repo.create_commit(
            'refs/heads/master',  # the name of the reference to update
            author,
            committer,
            'Add a second commit to testfile for testing',
            # binary string representing the tree object ID
            tree,
            # list of binary strings representing parents of the new commit
            [last_commit.oid.hex]
        )

        # Third commit
        with open(os.path.join(repopath, 'testfile'), 'a') as stream:
            stream.write('\nfoo3\n bar3')
        clone_repo.index.add('testfile')

refname = "refs/heads/master"
        ori_remote = clone_repo.remotes[0]
        PagureRepo.push(ori_remote, refname)

        master_branch = clone_repo.lookup_branch("master")
        first_commit = master_branch.peel().hex

        # Second commit
        with open(os.path.join(repopath, ".gitignore"), "w") as stream:
            stream.write("*~")
        clone_repo.index.add(".gitignore")
        clone_repo.index.write()

        tree = clone_repo.index.write_tree()
        author = pygit2.Signature("Alice Author", "alice@authors.tld")
        committer = pygit2.Signature("Cecil Committer", "cecil@committers.tld")
        clone_repo.create_commit(
            "refs/heads/maxamilion/feature",
            author,
            committer,
            "Add .gitignore file for testing",
            # binary string representing the tree object ID
            tree,
            # list of binary strings representing parents of the new commit
            [first_commit],
        )

        refname = "refs/heads/maxamilion/feature"
        ori_remote = clone_repo.remotes[0]
        PagureRepo.push(ori_remote, refname)

        shutil.rmtree(newpath)

with open(os.path.join(docrepo, "sources"), "w") as stream:
            stream.write("foo\n bar")
        repo.index.add("sources")
        repo.index.write()

        folderpart = os.path.join(docrepo, "folder1", "folder2")
        os.makedirs(folderpart)
        with open(os.path.join(folderpart, "test_file"), "w") as stream:
            stream.write("row1\nrow2\nrow3")
        repo.index.add(os.path.join("folder1", "folder2", "test_file"))
        repo.index.write()

        # Commits the files added
        tree = repo.index.write_tree()
        author = pygit2.Signature("Alice Author", "alice@authors.tld")
        committer = pygit2.Signature("Cecil Committer", "cecil@committers.tld")
        repo.create_commit(
            "refs/heads/master",  # the name of the reference to update
            author,
            committer,
            "Add test files and folder",
            # binary string representing the tree object ID
            tree,
            # list of binary strings representing parents of the new commit
            [],
        )

        # Push the changes to the bare repo
        remote = repo.create_remote(
            "origin", os.path.join(self.path, "repos", "docs", "test.git")
        )

def commit(self, message, author_name, author_email, **kwargs):
        if self.dirty:
            raise IndexError('Index already commited')

        ref = kwargs.pop('ref', 'HEAD')
        commiter_name = kwargs.pop('commiter_name', author_name)
        commiter_email = kwargs.pop('commiter_email', author_email)
        parents = kwargs.pop(
            'parents', [self.revision.id] if self.revision else [])

        author = pygit2.Signature(author_name, author_email)
        commiter = pygit2.Signature(commiter_name, commiter_email)

        # Create tree
        tree = IndexTree(self)

        for path, (oid, mode) in self.stash.items():
            if oid is None:
                tree.remove(path)
            else:
                tree.add(path, oid, mode)

        oid = tree.write()
        self.dirty = True

        branch = re.sub("refs/heads/", "", ref)
        if not self.repository.is_bare and (branch == self.repository.current_head or
           self.repository.current_head is None):

def write_commit(self, message: typing.Optional[str] = ""):
        now = int(time.time())

        parents: typing.List[git.Oid]
        if self._commit:
            parents = [ self._commit ]
        else:
            parents = []

        sig = git.Signature(self._name, self._email, time=now)

        self._commit = self._repo.create_commit(
            "HEAD",
            sig,
            sig,
            message,
            self._tree,
            parents,
        )

def get_author(self, user=None):
        if user is not None:
            author_name = f'User {user.id}'
            author_email = user.email
        else:
            author_name = 'Mozilla Add-ons Robot'
            author_email = 'addons-dev-automation+github@mozilla.com'
        return pygit2.Signature(name=author_name, email=author_email)