要更改AppVeyor的授权行为，您可以使用GitHub API来更新帐户的访问令牌权限。以下是使用Python的代码示例：

import requests
import json

# GitHub账户信息
github_username = 'your_username'
github_token = 'your_token'

# AppVeyor账户信息
appveyor_account = 'your_appveyor_account'
appveyor_token = 'your_appveyor_token'

# 获取GitHub账户的所有授权
headers = {'Authorization': f'token {github_token}'}
response = requests.get(f'https://api.github.com/users/{github_username}/tokens', headers=headers)
tokens = json.loads(response.text)

# 查找AppVeyor授权的令牌
appveyor_token_id = None
for token in tokens:
    if token['note'] == 'AppVeyor':
        appveyor_token_id = token['id']
        break

# 更新AppVeyor授权的令牌
if appveyor_token_id:
    data = {
        'note': 'AppVeyor',
        'note_url': 'https://ci.appveyor.com/api-token',
        'scopes': ['repo'],
        'fingerprint': appveyor_token
    }
    response = requests.patch(f'https://api.github.com/user/tokens/{appveyor_token_id}', headers=headers, data=json.dumps(data))
    if response.status_code == 200:
        print('AppVeyor授权行为的GitHub账户已更新')
    else:
        print('更新AppVeyor授权行为的GitHub账户失败')
else:
    print('未找到AppVeyor授权的令牌')

在上述代码中，您需要替换your_username、your_token、your_appveyor_account和your_appveyor_token为您自己的账户和令牌信息。此代码将使用GitHub API获取您的账户的所有授权令牌，然后查找名称为“AppVeyor”的令牌并更新其权限。