Golang claims my method is undefined, but it's RIGHT THERE

I'm having trouble understanding why Go isn't recognizing one singular method from outside of its package. This isn't happening with any other methods used outside of their packages. I am rather new to Go, so I'm wondering if there is some aspect of scope that I'm just missing.

database.go:

package database

type Database struct {
    fileString    string
}

db-table-person.go:

package database

import (
    "context"
)

type Person struct {
    Name    string
    Age     int
}

func (db *Database) AddPerson(ctx context.Context, person *Person) error {
   // code to add a person to a database
}

get-objects-from-file.go:

package myapp

import (
    "encoding/json"
    "os"
    "ioutil"
    
    database "path/to/database/package/that/works/for/every/other/database/method"
)

type BundleOfObjects struct {
    People []database.People
    Dogs   []database.Dogs
}

func LoadObjectsFromFile(filename string) (objects BundleOfObjects) {
    jsonFile, _ := os.Open(filename)
    defer jsonFile.Close()

    bytevalue, _ := ioutil.ReadAll(jsonFile)

    var objects BundleOfObjects

    _ = json.Unmarshal(byteValue, &BundleOfObjects)

    return BundleOfObjects
}

main.go:

package main

import (
    "context"

    database "path/to/database/package/that/works/for/every/other/method/in/the/database/package/"
    myapp "path/to/myapp/that/works/for/every/other/method/in/myapp"
)

func main() {
    filename := "myfile.json"

    bundleOfObjects := myapp.LoadObjectsFromFile(filename)

    for _, p := range bundleOfObjects.People {
        database.AddPerson(context.Background(), p)
    }
}
    

I get the following error referencing the call to AddPerson in main.go: undefined: database.AddPerson

I cannot stress enough that I have successfully shared many methods throughout these three packages with zero issues whatsoever, all seemingly using this exact same process. What am I missing?

As always, just a minute or two after posting my question, the answer becomes apparent. The problem is that AddPerson() is a method, not just a function without a receiver. It needs to be called on an existing instance of Database. So in main.go, I would need to create a database instance first and then use it to call AddPerson(). Like so:

main.go:

package main

import (
    "context"

    database "path/to/database/package/that/works/for/every/other/method/in/the/database/package/"
    myapp "path/to/myapp/that/works/for/every/other/method/in/myapp"
)

func main() {
    filename := "myfile.json"
    db := database.Database{fileString: "my-database.db"}


    bundleOfObjects := myapp.LoadObjectsFromFile(filename)

    for _, p := range bundleOfObjects.People {
        db.AddPerson(context.Background(), p)
    }
}