Custom Pie Menu not being called by hotkey

I have written a pie menu for shading objects. In the script, I have included a hotkey assignment. It shows up in User Preferences however when I press said hotkey, it isn’t showing up. I can call it from the console so I don’t know why it’s not working.

bl_info = {    "name": "Shader Pie",
    "description": "Custom shader pie menu",
    "author": "Lee Hesketh",
    "version": (0, 1, 1),
    "blender": (2, 75, 0),
    "location": "3D View",
    "warning": "",
    "wiki_url": "",
    "category": "Shading Pie"
    }


import bpy
from bpy.types import Menu, Operator


class auto_smooth(Operator):
    bl_idname = "object.auto_smooth"
    bl_label = "Auto Smooth"
        
    def execute(slef, context):
        bpy.ops.object.shade_smooth()
        bpy.context.object.data.use_auto_smooth = True  
        return {"FINISHED"}


class shader_pie(Menu):
    bl_label = "Shading"
    bl_idmane = "pie.shader"


    def draw(self, context):
        layout = self.layout
        pie = layout.menu_pie()
        pie.operator("object.shade_smooth")
        pie.operator("object.shade_flat")
        pie.operator("object.auto_smooth")

addon_keymaps = []

def register():
    bpy.utils.register_class(shader_pie)
    bpy.utils.register_class(auto_smooth)
    
    wm = bpy.context.window_manager
    if wm.keyconfigs.addon:
            km = wm.keyconfigs.addon.keymaps.new(name='Object Mode')
            kmi = km.keymap_items.new('wm.call_menu_pie', 'BACK_SLASH', 'PRESS')
            kmi.properties.name = "pie.shader"
            addon_keymaps.append((km, kmi))


def unregister():
    bpy.utils.unregister_class(shader_pie)
    bpy.utils.unregister_class(auto_smooth)
    wm = bpy.context.window_manager
    kc = wm.keyconfigs.addon
    if kc:
        for km, kmi in addon_keymaps:
            km.keymap_items.remove(kmi)
    addon_keymaps.clear()


if __name__ == "__main__":
    register()

My guess is your typos. It works here with 2.79.

bl_info = {    "name": "Shader Pie",
    "description": "Custom shader pie menu",
    "author": "Lee Hesketh",
    "version": (0, 1, 1),
    "blender": (2, 75, 0),
    "location": "3D View",
    "warning": "",
    "wiki_url": "",
    "category": "Shading Pie"
    }


import bpy
from bpy.types import Menu, Operator


class auto_smooth(Operator):
    bl_idname = "object.auto_smooth"
    bl_label = "Auto Smooth"
        
    def execute(self, context):
        bpy.ops.object.shade_smooth()
        bpy.context.object.data.use_auto_smooth = True  
        return {"FINISHED"}


class shader_pie(Menu):
    bl_label = "Shading"
    bl_idname = "pie.shader"


    def draw(self, context):
        layout = self.layout
        pie = layout.menu_pie()
        pie.operator("object.shade_smooth")
        pie.operator("object.shade_flat")
        pie.operator("object.auto_smooth")

addon_keymaps = []

def register():
    bpy.utils.register_class(shader_pie)
    bpy.utils.register_class(auto_smooth)
    
    wm = bpy.context.window_manager
    if wm.keyconfigs.addon:
            km = wm.keyconfigs.addon.keymaps.new(name='Object Mode')
            kmi = km.keymap_items.new('wm.call_menu_pie', 'BACK_SLASH', 'PRESS')
            kmi.properties.name = "pie.shader"
            addon_keymaps.append((km, kmi))


def unregister():
    bpy.utils.unregister_class(shader_pie)
    bpy.utils.unregister_class(auto_smooth)
    wm = bpy.context.window_manager
    kc = wm.keyconfigs.addon
    if kc:
        for km, kmi in addon_keymaps:
            km.keymap_items.remove(kmi)
    addon_keymaps.clear()


if __name__ == "__main__":
    register()

Dammit! I thought I got rid of all of them. Thank you so much!