我的数据库和模型有所有相关字段。我想发送查询到数据库，但我遇到了这个错误。：

error: error occurred while decoding column 0: expected value at line 13 column 5
   --> src/handler.rs:98:16
    |
98  |       let user = sqlx::queryas!(
    |  __^
99  | |         User,
100 | |         "SELECT * FROM users WHERE pan = $1",
101 | |         body.pan
102 | |     )
    | |__^
    |
    = note: this error originates in the macro $crate::sqlx_macros::expand_query which comes from the expansion of the macro sqlx::query_as (in Nightly builds, run with -Z macro-backtrace for more info)

字符串
我正在使用sqlx与Axum和postgres。

编码

let user = sqlx::query_as!(
        User,
        "SELECT * FROM users WHERE pan = $1",
        body.pan
    )
    .fetch_optional(&data.db)
    .await

[dependencies]
argon2 = "0.5.0"
axum = "0.6.18"
axum-extra = { version = "0.7.4", features = ["cookie"] }
chrono = { version = "0.4.26", features = ["serde"] }
dotenv = "0.15.0"
sqlx = { version = "0.7.0", features = ["runtime-async-std-native-tls", "postgres", "chrono", "uuid"] }
time = "0.3.22"
tokio = { version = "1.29.1", features = ["full"] }
uuid = { version = "1.4.0", features = ["serde", "v4"] }

的数据