example.com', redirect_uri='https://a.b/callback')
            'https://example.com?client_id=your_id&response_type=code&redirect_uri=https%3A%2F%2Fa.b%2Fcallback'
            >>> client.prepare_request_uri('https://example.com', scope=['profile', 'pictures'])
            'https://example.com?client_id=your_id&response_type=code&scope=profile+pictures'
            >>> client.prepare_request_uri('https://example.com', code_challenge='kjasBS523KdkAILD2k78NdcJSk2k3KHG6')
            'https://example.com?client_id=your_id&response_type=code&code_challenge=kjasBS523KdkAILD2k78NdcJSk2k3KHG6'
            >>> client.prepare_request_uri('https://example.com', code_challenge_method='S256')
            'https://example.com?client_id=your_id&response_type=code&code_challenge_method=S256'
            >>> client.prepare_request_uri('https://example.com', foo='bar')
            'https://example.com?client_id=your_id&response_type=code&foo=bar'

        .. _`Appendix B`: https://tools.ietf.org/html/rfc6749#appendix-B
        .. _`Section 2.2`: https://tools.ietf.org/html/rfc6749#section-2.2
        .. _`Section 3.1.2`: https://tools.ietf.org/html/rfc6749#section-3.1.2
        .. _`Section 3.3`: https://tools.ietf.org/html/rfc6749#section-3.3
        .. _`Section 10.12`: https://tools.ietf.org/html/rfc6749#section-10.12
        Nr