See this example properly formatted in the QUT Cite tool.
Standard in-text citation examples are in Getting started - In-text citation.
Author, A. A. [@username]. (Year, Month DD). Content of the post up to the first 20 words [Description of any audiovisuals] [Tweet/Instagram post]. Site Name. http:xxxxxx
Obama, B. [@BarackObama]. (2012, November 7). Four more years [Image attached] [Tweet]. Twitter. https://twitter.com/BarackObama/status/266031293945503744
Author, A. A. (Year, Month DD). Content of the post up to the first 20 words [Description of any audiovisuals] [Description of post]. Site Name. http:xxxxxx
Gaiman, N. (2012, February 29). Please celebrate Leap Year Day in the traditional manner by taking a writer out for dinner. [Status update]. Facebook. https://www.facebook.com/neilgaiman/posts/10150574185041016
Cite only original content from social media sites. If you used social media to discover content from other sources, cite the original source.
If you are quoting or paraphrasing a particular section of a post but it will not be accessible to the public because of privacy settings, then treat it as a Personal communication.
If the item contains no words, provide a description of the item in square brackets.
Do not alter the spelling and capitalization in social media references.
For more information see the APA Blog for Reference Examples.