auto_walk/preferences.py

import bpy

class UAC_addon_prefs(bpy.types.AddonPreferences):
    ## can be just __name__ if prefs are in the __init__ mainfile
    # Else need the splitext '__name__ = addonname.subfile' (or use a static name)
    bl_idname = __name__.split('.')[0] # or with: os.path.splitext(__name__)[0]

    # some_bool_prop to display in the addon pref
    debug : bpy.props.IntProperty(
        name='Debug',
        description="Enable Debug prints\n\
            0 = no prints\n\
            1 = basic\n\
            2 = full prints",
        default=0)

    tgt_bone : bpy.props.StringProperty(
        name="Constrained Pose bone name", default='world',
        description="name of the bone that suppose to hold the constraint")

    """ default_forward_axis : bpy.props.EnumProperty(
        name='Forward Axis',
        default='TRACK_NEGATIVE_Y', # Modifier default is FORWARD_X
        description='Axis that points forward along the path',
        items=(
            ('FORWARD_X', 'X', ''),
        ('FORWARD_Y', 'Y', ''),
        ('FORWARD_Z', 'Z', ''),
        ('TRACK_NEGATIVE_X', '-X', ''),
        ('TRACK_NEGATIVE_Y', '-Y', ''),
        ('TRACK_NEGATIVE_Z', '-Z', ''),
            ),
        )
     """
    
    def draw(self, context):
            layout = self.layout
            layout.use_property_split = True

            box = layout.box()
            box.label(text='Curve creation parameters:')
            box.prop(self, "tgt_bone")
            # box.prop(self, "default_forward_axis", text='Default Forward Axis')

            layout.prop(self, "debug")

def register():
    bpy.utils.register_class(UAC_addon_prefs)

def unregister():
    bpy.utils.unregister_class(UAC_addon_prefs)