The error "personal is not defined" occurs when running Geth

I want to use Geth to set up a local Ethereum test network.
My startup command is: geth --datadir ./data --nodiscover console 2>>geth.log.
When I tried to create an account using personal.newAccount("12345"), the terminal reported an error "personal is not defined".

I tried to add the command --http --http.api 'web3,eth,net,debug,personal'to the startup command, but it didn't work.

Personal Namespace has been deprecated.
Instead,
create a new user with the Clef command.

If you have installed geth, clef should be installed.

which clef
>/opt/homebrew/bin/clef

or something similar.

To create a new user with clef, create a keystore file. if there is no keystore folder directly under dataDir, create one.

mkdir [yourDataDir/keystore]

Then run the following command

clef newaccount --keystore [yourDataDir/keystore]

After typing the command
You will be asked for "ok". Then enter your password. (At least 10 characters).

> Your new key was generated

should appear on the screen.

The key file is generated in the folder specified in
--keystore.

Next, start by specifying the folder where the keystore file generated by the geth command is located.

For example, specify it with the --keystore option as follows.

geth --networkid "15" --nodiscover --datadir . / --keystore . /keystore console 2>> . /log/geth_err.log

When the prompt starts up.
You can check in prompt

eth.accounts
>["0x94c52f891819d46b15d84a05e621f15f20ab307b"]

Your user wallet should have increased.