Refer: https://developers.line.biz/en/news/2021/04/09/line-login-pkce-support/

In the GetFriendshipStatusCall.Do method, there is a bug that causes a runtime panic with the error message "assignment to entry in nil map". This error occurs when trying to set a value in the urlQuery map, which has been declared but not initialized.

Here is the problematic code:

func (call *GetFriendshipStatusCall) Do() (*GetFriendshipStatusResponse, error) {
	var urlQuery url.Values
	urlQuery.Set("access_token", call.accessToken)
	...
}

https://developers.line.biz/en/news/#notice-of-problems-with-migration-of-line-official-accounts-resolved-2019-06-18

• The parameter ui_locales lets you specify the display language and script for LINE Login.
• The property amr specifies the authentication methods used in authentication. This corresponds to the OpenID Connect 1.0 amr Claim.

In social.go, line 68 and line 124:

// line 68
req, err := http.NewRequest("GET", path.Join(APIEndpointAuthBase, APIEndpointAuthorize), nil)
// line 124
req, err := http.NewRequest("GET", APIEndpointTokenVerify, nil)

The expected urls are https://access.line.me/oauth2/v2.1/authorize and https://api.line.me/oauth2/v2.1/verify respectively. However, the above code will give https:/access.line.me/oauth2/v2.1/authorize and https:/api.line.me/oauth2/v2.1/verify.

TokenVerify err: Get /oauth2/v2.1/verify: unsupported protocol scheme ""