readme update

README.md

@@ -22,6 +22,9 @@ args:
 - $3 subdomain (synapse.example.org)   
 returns a matrix access token
 
+### create_matrix_account.sh
+Usage: ./create_matrix_account.sh \<username> \<password> \<admin:true|false> \<matrix server domain> \<shared_secret> [displayname]
+
 ### convert_md_to_pdf.sh
 (need to be used with listings-setup.tex in the same folder, xelatex and pandoc are required)   
 convert infile.md in the current folder to a pdf file (outfile.pdf) with code blocks in red boxes.