constrain cast parameters to letters only
constrain cast parameters to letters only

giserh/postgrest,steve-chavez/postgrest,motiz88/postgrest,calebmer/postgrest,pap/postgrest,NotBrianZach/postgrest,diogob/postgrest,league/postgrest,steve-chavez/postgrest,elitallman/postgrest,begriffs/postgrest,w4ngyi/postgrest,ruslantalpa/postgrest,Skyfold/postgrest,beni55/postgrest,NikolayS/postgrest