Getting User based bearer token
How can i create a user based bearer token using username of the user. I created it following way. But for that it needs user password. i need to do it using only user name. private string GetUserAccessToken() { string clientId = "XXXX"; string appKey = "XXXX"; string tenantId = "XXXX"; string accessToken = string.Empty; string apiEndpoint = "https://login.microsoftonline.com/" + tenantId + "/oauth2/v2.0/token"; WebRequest accessTokenRequest = WebRequest.Create(apiEndpoint); accessTokenRequest.Method = "POST"; accessTokenRequest.ContentType = "application/x-www-form-urlencoded"; string requestParams = "grant_type=password&client_id=" + clientId + "&client_secret=" + appKey + "&scope=https://graph.microsoft.com/.default" + "&userName=XXXX&password=XXXX"; byte[] byteArray = Encoding.UTF8.GetBytes(requestParams); accessTokenRequest.ContentLength = byteArray.Length; Stream dataStream = accessTokenRequest.GetRequestStream(); dataStream.Write(byteArray, 0, byteArray.Length); dataStream.Close(); using (WebResponse response = accessTokenRequest.GetResponse()) { string json = string.Empty; using (StreamReader reader = new StreamReader(response.GetResponseStream())) { json = reader.ReadToEnd(); } O365AccessTokenModel accessTokenModel = JsonConvert.DeserializeObject<O365AccessTokenModel>(json); accessToken = accessTokenModel.access_token; } return accessToken; } But i need to do it without password. is there ant possible way to do it.