why does a vital part always need to be missing from the docs...

[joshh71390]

steem.broadcast.limitOrderCreate(
process.env.ACTIVE_KEY
config.account,
orderID,
amountToSell,
minToReceive,
false,
expiration,
function(err, result) {
console.log(err, result);
}
)

AssertionError [ERR_ASSERTION]: private_key required
at Function.signBufferSha256 (C:\Users\joshh\tradebot\js\node_modules\steem\lib\auth\ecc\src\signature.js:130:13)
at Function.signBuffer (C:\Users\joshh\tradebot\js\node_modules\steem\lib\auth\ecc\src\signature.js:116:30)
at Object.Auth.signTransaction (C:\Users\joshh\tradebot\js\node_modules\steem\lib\auth\index.js:119:23)
at C:\Users\joshh\tradebot\js\node_modules\steem\lib\broadcast\index.js:52:64
at tryCatcher (C:\Users\joshh\tradebot\js\node_modules\bluebird\js\release\util.js:16:23)
at Promise._settlePromiseFromHandler (C:\Users\joshh\tradebot\js\node_modules\bluebird\js\release\promise.js:547:31)
at Promise._settlePromise (C:\Users\joshh\tradebot\js\node_modules\bluebird\js\release\promise.js:604:18)
at Promise._settlePromise0 (C:\Users\joshh\tradebot\js\node_modules\bluebird\js\release\promise.js:649:10)
at Promise._fulfill (C:\Users\joshh\tradebot\js\node_modules\bluebird\js\release\promise.js:673:18)
at Promise._resolveCallback (C:\Users\joshh\tradebot\js\node_modules\bluebird\js\release\promise.js:466:57)
at Promise._settlePromiseFromHandler (C:\Users\joshh\tradebot\js\node_modules\bluebird\js\release\promise.js:559:17)
at Promise._settlePromise (C:\Users\joshh\tradebot\js\node_modules\bluebird\js\release\promise.js:604:18)
at Promise._settlePromise0 (C:\Users\joshh\tradebot\js\node_modules\bluebird\js\release\promise.js:649:10)
at Promise._settlePromises (C:\Users\joshh\tradebot\js\node_modules\bluebird\js\release\promise.js:729:18)
at Promise._fulfill (C:\Users\joshh\tradebot\js\node_modules\bluebird\js\release\promise.js:673:18) {
generatedMessage: false,
code: 'ERR_ASSERTION',
actual: undefined,
expected: true,
operator: '=='
PS C:\Users\joshh\tradebot\js> node index.js
C:\Users\joshh\tradebot\js\index.js:140
}
^

please someone just tell me the secret of how to sign transactions...