Parameter 'API' is required error

I have:

local OracleMod = require “OracleMod”
function main(data)
local conn = connectOracle(‘T01291.WORLD’,’V500_RPT’,’REPORT’)
conn.query{sql=”SELECT COLUMN_NAME FROM DBA_TAB_COLUMNS WHERE TABLE_NAME = ‘PERSON'”}
end

My module is:

function connectOracle(vInstance, vUserid, vPassword)
local conn = db.connect{api=db.ORACLE_OCI,name=vInstance,user=vUserid,password=vPassword,live=true }
return conn
end

When I execute, I get the “Parameter ‘api’ is required” error. , since I am not passing it in, and hard coding it, why am i getting th is error?

Found it

conn:query{sql=”SELECT COLUMN_NAME FROM DBA_TAB_COLUMNS WHERE TABLE_NAME = ‘PERSON'”}

I had conn.query, which worked while it was in Main(), but the : notation is used in modules, from what I can figure out.